Update GitHub CI workflow

This change updates the GitHub Action workflow used for CI, adding
names to the jobs as well as a terminal job that will simplify the
process of adding required status checks to branches.

Having a known terminal job that is consistent across all projects
makes it easy to add a required status check for a branch—one that
will not change as new intermediate jobs are added.

.github/workflows/node.js.yml → .github/workflows/build-test.yml

@@ -1,7 +1,4 @@
-# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
-
-name: Node.js CI
+name: Tests
 
 on:
   push:
@@ -11,19 +8,24 @@ on:
 
 jobs:
   build:
-
-    runs-on: ubuntu-latest
-
+    name: Build & test
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         node-version: [10.x, 12.x, 14.x]
-
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
     - run: yarn
-    - run: npm run build --if-present
-    - run: npm test
+    - run: yarn build
+    - run: yarn test
+  all-jobs-pass:
+    name: All jobs pass
+    runs-on: ubuntu-20.04
+    needs:
+      - build
+    steps:
+    - uses: actions/checkout@v2