chore(ci): Use github actions to run CI (#583)

* chore(ci): Use github actions to run CI

* chore(ci): Cache yarn dependencies on CI

* chore(ci): Remove Travis CI build

Author: armandabric

.github/workflows/continuous-integration.yaml

@@ -0,0 +1,37 @@
+name: Continuous Integration
+
+on: pull_request
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2-beta
+        with:
+          node-version: '14'
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - uses: actions/cache@v2
+        id: yarn-cache
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - run: yarn install --frozen-lockfile
+      - run: yarn run test
+      - run: yarn run lint
+      - run: yarn run flow
+      - run: yarn run smoke cjs 15.6.2
+      - run: yarn run smoke esm 15.6.2
+      - run: yarn run smoke cjs 16.7.0
+      - run: yarn run smoke esm 16.7.0
+      - run: yarn run smoke cjs 17.0.1
+      - run: yarn run smoke esm 17.0.1
+      - run: yarn run smoke cjs latest
+      - run: yarn run smoke esm latest
+      - run: yarn run smoke cjs next
+      - run: yarn run smoke esm next
+