ci: migrate to GitHub actions

Author: felixfbecker

.github/workflows/build.yml

@@ -0,0 +1,26 @@
+name: build
+
+on: [push, pull_request]
+
+env:
+  FORCE_COLOR: 3
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+      - run: yarn
+      - run: yarn run prettier-check
+      - run: yarn run eslint
+      - run: yarn run build
+      - name: release
+        if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: yarn run semantic-release