Updated ruby version to get latest gems

Author: 2016rshah

Gemfile

@@ -1,4 +1,4 @@
-source 'https://rubygems.org'
+source 'http://rubygems.org'
+ruby "2.6.6"
 gem 'sinatra'
-
-gem 'githubchart'
+gem 'githubchart', '>= 3.2.0'

Gemfile.lock

@@ -1,34 +1,35 @@
 GEM
-  remote: https://rubygems.org/
+  remote: http://rubygems.org/
   specs:
     basiccache (1.0.0)
-    curb (0.8.8)
-    githubchart (1.0.1)
-      githubstats (~> 1.1.0)
-      svgplot (~> 0.2.0)
-    githubstats (1.1.0)
+    githubchart (3.2.0)
+      githubstats (~> 3.1.0)
+      svgplot (~> 1.0.0)
+    githubstats (3.1.0)
       basiccache (~> 1.0.0)
-      curb (~> 0.8.6)
-      nokogiri (~> 1.6.5)
-    mini_portile (0.6.2)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
+      nokogiri (~> 1.10.8)
+    mini_portile2 (2.4.0)
+    nokogiri (1.10.10)
+      mini_portile2 (~> 2.4.0)
     rack (1.6.4)
     rack-protection (1.5.3)
       rack
     sinatra (1.4.6)
       rack (~> 1.4)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
-    svgplot (0.2.0)
+    svgplot (1.0.0)
     tilt (2.0.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  githubchart
+  githubchart (>= 3.2.0)
   sinatra
 
+RUBY VERSION
+   ruby 2.6.6p146
+
 BUNDLED WITH
-   1.10.6
+   1.17.3