Run CI via GitHub actions

.github/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  build:
+    name: Test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    steps:
+      - run: git config --global core.autocrlf input
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '12'
+          cache: 'yarn'
+
+      - run: yarn install
+      - run: yarn lint
+      - run: yarn flow
+      - run: yarn test --coverage
+      - run: yarn build
+      - run: yarn run bundlesize
+      - run: yarn esdoc
+
+      - name: Coveralls
+        env:
+          COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+        if: matrix.os == 'ubuntu-latest' && github.head_ref == 'main'
+        run: yarn coveralls
+        shell: bash
+
+      - name: Publish to Chromatic
+        if: matrix.os == 'ubuntu-latest'
+        uses: chromaui/action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          projectToken: ${{ secrets.CHROMATIC_PROJECT_TOKEN }}
+          autoAcceptChanges: main
+          exitZeroOnChanges: true
+          exitOnceUploaded: true