diff --git a/package-lock.json b/package-lock.json
index eb969ee..9985c1b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -962,6 +962,7 @@
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       "resolved": "https://registry.npmjs.org/are-we-there-yet/-/are-we-there-yet-1.1.4.tgz",
       "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
+      "optional": true,
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@@ -1127,7 +1128,8 @@
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       "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.6.0.tgz",
-      "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4="
+      "integrity": "sha1-g+9cqGCysy5KDe7e6MdxudtXRx4=",
+      "optional": true
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@@ -1389,6 +1391,7 @@
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       "resolved": "https://registry.npmjs.org/boom/-/boom-4.3.1.tgz",
       "integrity": "sha1-T4owBctKfjiJ90kDD9JbluAdLjE=",
+      "optional": true,
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       }
@@ -1963,6 +1966,7 @@
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       "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.5.tgz",
       "integrity": "sha1-k4NwpXtKUd6ix3wV1cX9+JUWQAk=",
+      "optional": true,
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@@ -2111,7 +2115,8 @@
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-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
+      "optional": true
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@@ -2285,6 +2290,7 @@
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       "integrity": "sha1-qJ+7Ig9c4l7FboxKqKT9e1sNKf4=",
+      "optional": true,
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@@ -2293,6 +2299,7 @@
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+          "optional": true,
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@@ -2805,7 +2812,8 @@
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       "resolved": "https://registry.npmjs.org/delegates/-/delegates-1.0.0.tgz",
-      "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o="
+      "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
+      "optional": true
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@@ -3037,17 +3045,34 @@
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-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.0.tgz",
-      "integrity": "sha1-ysmvh2LIWDYYcAPI3+GT5eLq5d8=",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+      "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
       "requires": {
-        "bn.js": "^4.4.0",
-        "brorand": "^1.0.1",
+        "bn.js": "^4.11.9",
+        "brorand": "^1.1.0",
         "hash.js": "^1.0.0",
-        "hmac-drbg": "^1.0.0",
-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0",
-        "minimalistic-crypto-utils": "^1.0.0"
+        "hmac-drbg": "^1.0.1",
+        "inherits": "^2.0.4",
+        "minimalistic-assert": "^1.0.1",
+        "minimalistic-crypto-utils": "^1.0.1"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA=="
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+        },
+        "minimalistic-assert": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz",
+          "integrity": "sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A=="
+        }
       }
     },
     "ember-cli-string-utils": {
@@ -3767,6 +3792,7 @@
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       "integrity": "sha1-b7lPvXGIUwbXPRXMSX/kzE7NRL8=",
+      "optional": true,
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@@ -3854,7 +3880,8 @@
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+          "bundled": true,
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@@ -3872,11 +3899,13 @@
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         "balanced-match": {
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
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@@ -3889,15 +3918,18 @@
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-          "bundled": true
+          "bundled": true,
+          "optional": true
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         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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@@ -4000,7 +4032,8 @@
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         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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@@ -4010,6 +4043,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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           }
@@ -4022,17 +4056,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
+          "optional": true,
           "requires": {
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             "yallist": "^3.0.0"
@@ -4049,6 +4086,7 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -4127,7 +4165,8 @@
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           "version": "1.0.1",
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+          "bundled": true,
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@@ -4137,6 +4176,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -4212,7 +4252,8 @@
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         "safe-buffer": {
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+          "bundled": true,
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@@ -4242,6 +4283,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -4259,6 +4301,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
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@@ -4297,11 +4340,13 @@
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         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
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         "yallist": {
           "version": "3.0.2",
-          "bundled": true
+          "bundled": true,
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@@ -4309,6 +4354,7 @@
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
+      "optional": true,
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@@ -4325,6 +4371,7 @@
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       "resolved": "https://registry.npmjs.org/gauge/-/gauge-2.7.4.tgz",
       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
+      "optional": true,
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@@ -4540,6 +4587,7 @@
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       "integrity": "sha1-ukAsJmGU8VlW7xXg/PJCmT9qff0=",
+      "optional": true,
       "requires": {
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@@ -4606,7 +4654,8 @@
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       "resolved": "https://registry.npmjs.org/has-unicode/-/has-unicode-2.0.1.tgz",
-      "integrity": "sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk="
+      "integrity": "sha1-4Ob+aijPUROIVeCG0Wkedx3iqLk=",
+      "optional": true
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@@ -4629,6 +4678,7 @@
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+      "optional": true,
       "requires": {
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@@ -4654,7 +4704,8 @@
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+      "integrity": "sha512-v0XCLxICi9nPfYrS9RL8HbYnXi9obYAeLbSP00BmnZwCK9+Ih9WOjoZ8YoHCoav2csqn4FOz4Orldsy2dmDwmQ==",
+      "optional": true
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@@ -5378,7 +5429,7 @@
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-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
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@@ -5635,7 +5686,7 @@
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-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.0.6.tgz",
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@@ -5847,6 +5898,7 @@
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           "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
+          "optional": true,
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@@ -5902,7 +5954,8 @@
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           "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
-          "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0="
+          "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
+          "optional": true
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+      "optional": true,
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@@ -6739,7 +6793,8 @@
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-      "integrity": "sha1-Rqarfwrq2N6unsBWV4C31O/rnUM="
+      "integrity": "sha1-Rqarfwrq2N6unsBWV4C31O/rnUM=",
+      "optional": true
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@@ -7752,7 +7807,7 @@
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-          "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
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@@ -7806,7 +7861,7 @@
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-              "resolved": "http://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
+              "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
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@@ -7856,7 +7911,7 @@
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-          "resolved": "http://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
+          "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.10.tgz",
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@@ -7965,7 +8020,7 @@
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-              "resolved": "http://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
+              "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
               "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ=",
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@@ -8389,6 +8444,7 @@
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+      "optional": true,
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@@ -8770,6 +8826,7 @@
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       "integrity": "sha1-UGQRDwr4X3z9t9a2ekACjOUrSys=",
+      "optional": true,
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@@ -9287,7 +9344,8 @@
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       "resolved": "https://registry.npmjs.org/stringstream/-/stringstream-0.0.5.tgz",
-      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg="
+      "integrity": "sha1-TkhM1N5aC7vuGORjB3EKioFiGHg=",
+      "optional": true
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@@ -9507,6 +9565,7 @@
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       "integrity": "sha1-C2GKVWW23qkL80JdBNVe3EdadWE=",
+      "optional": true,
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@@ -9953,7 +10012,8 @@
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+      "integrity": "sha512-DIWtzUkw04M4k3bf1IcpS2tngXEL26YUD2M0tMDUpnUrz2hgzUBlD55a4FjdLGPvfHxS6uluGWvaVEqgBcVa+g==",
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@@ -10461,6 +10521,7 @@
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+      "optional": true,
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       }