.github/workflows/main.yml

@@ -0,0 +1,26 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 16
+          - 14
+          - 12
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install --force
+      - run: npm test
+      - uses: codecov/codecov-action@v1
+        if: matrix.node-version == 14
+        with:
+          fail_ci_if_error: true

.gitignore

@@ -2,5 +2,9 @@ node_modules
 yarn.lock
 !test/fixtures/project/node_modules
 test/fixtures/project/node_modules/.cache
+!test/fixtures/typescript/extends-module/node_modules
+test/fixtures/typescript/extends-module/node_modules/.cache
+!test/fixtures/typescript/extends-tsconfig-bases/node_modules
+test/fixtures/typescript/extends-tsconfig-bases/node_modules/.cache
 .nyc_output
 coverage