Adjust GitHub actions and other small fixes (Merge PR #9)

Author: julienw

.github/stale.yml

@@ -1,9 +1,38 @@
 name: test
-on: [push, pull_request]
+
+on:
+  # Trigger the workflow on push or pull request,
+  # but only for the master branch
+  push:
+    branches:
+      - master
+    pull_request:
+      branches:
+        - master
+
 jobs:
   test:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - run: yarn
-      - run: yarn test
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: 'yarn'
+      - run: yarn install
+      - run: yarn lint
+      - run: yarn test:only
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          cache: 'yarn'
+      - run: yarn install
+      - run: yarn build:dist
+      - run: yarn build:es5
+      - run: yarn build:es6
+      - run: yarn build:examples