Simplify CI workflows

Author: Mrtenz

.github/workflows/build-lint-test.yml

@@ -17,8 +17,8 @@ jobs:
       - name: Install Yarn dependencies
         run: yarn --immutable
 
-  build-source:
-    name: Build source
+  build:
+    name: Build
     runs-on: ubuntu-latest
     needs:
       - prepare
@@ -33,32 +33,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: 'yarn'
       - run: yarn --immutable --immutable-cache
-      - run: yarn build:source
-      - name: Require clean working directory
-        shell: bash
-        run: |
-          if ! git diff --exit-code; then
-            echo "Working tree dirty at end of job"
-            exit 1
-          fi
-
-  build-types:
-    name: Build types
-    runs-on: ubuntu-latest
-    needs:
-      - prepare
-    strategy:
-      matrix:
-        node-version: [16.x, 18.x, 20.x]
-    steps:
-      - uses: actions/checkout@v3
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
-        with:
-          node-version: ${{ matrix.node-version }}
-          cache: 'yarn'
-      - run: yarn --immutable --immutable-cache
-      - run: yarn build:types
+      - run: yarn build
       # This step is dependent on the TypeScript build output, so it's run
       # here, rather than in the test job.
       - run: yarn test:types