Extract usage tests into separate GitHub Actions workflow

Primarily to group similar kinds of "usage" tests together, which are
all either verifying the use of mustache.js from consuming party' point
of view.

.github/workflows/usage.yml

@@ -0,0 +1,94 @@
+name: Package usage
+
+on: [push, pull_request]
+
+jobs:
+  package:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.x
+      - name: Create package tarball
+        run: |
+          export ARCHIVE_FILENAME=$(npm pack | tail -n 1)
+          mv $ARCHIVE_FILENAME mustache.tgz
+      - name: Store package tarball for later
+        uses: actions/upload-artifact@v2
+        with:
+          name: package-output
+          path: mustache.tgz
+
+  common-js-usage:
+    runs-on: ubuntu-latest
+
+    needs: package
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+      - name: Get package tarball from package step
+        uses: actions/download-artifact@v2
+        with:
+          name: package-output
+      - name: Package, install and test
+        run: |
+          export UNPACK_DESTINATION=$(mktemp -d)
+          mv mustache.tgz $UNPACK_DESTINATION
+          cp test/module-systems/commonjs-test.js $UNPACK_DESTINATION
+          cd $UNPACK_DESTINATION
+          npm install mustache.tgz
+          node commonjs-test.js
+
+  esm-usage:
+    runs-on: ubuntu-latest
+
+    needs: package
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '>=13.2.0'
+      - name: Get package tarball from package step
+        uses: actions/download-artifact@v2
+        with:
+          name: package-output
+      - name: Package, install and test
+        run: |
+          export UNPACK_DESTINATION=$(mktemp -d)
+          mv mustache.tgz $UNPACK_DESTINATION
+          cp test/module-systems/esm-test.mjs $UNPACK_DESTINATION
+          cd $UNPACK_DESTINATION
+          npm install mustache.tgz
+          node esm-test.mjs
+
+  browser-usage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12.x
+      - name: Install and test
+        run: |
+          npm ci
+          npx mocha test/module-systems/browser-test.js
+
+  deno-usage:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: denolib/setup-deno@master
+        with:
+          deno-version: 'v1.0.0'
+      - run: deno --version
+      - run: deno test --allow-net=deno.land test/module-systems/deno-test.ts

.github/workflows/verify.yml

@@ -43,69 +43,6 @@ jobs:
           npm install mocha@3 chai@3
           npm run test-unit
 
-  common-js-usage:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - name: Setup Node.js
-        uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
-      - name: Package, install and test
-        run: |
-          export ARCHIVE_FILENAME=$(npm pack | tail -n 1)
-          export UNPACK_DESTINATION=$(mktemp -d)
-          mv $ARCHIVE_FILENAME $UNPACK_DESTINATION
-          cp test/module-systems/commonjs-test.js $UNPACK_DESTINATION
-          cd $UNPACK_DESTINATION
-          npm install $ARCHIVE_FILENAME
-          node commonjs-test.js
-
-  esm-usage:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - name: Setup Node.js
-        uses: actions/setup-node@v1
-        with:
-          node-version: '>=13.2.0'
-      - name: Package, install and test
-        run: |
-          export ARCHIVE_FILENAME=$(npm pack | tail -n 1)
-          export UNPACK_DESTINATION=$(mktemp -d)
-          mv $ARCHIVE_FILENAME $UNPACK_DESTINATION
-          cp test/module-systems/esm-test.mjs $UNPACK_DESTINATION
-          cd $UNPACK_DESTINATION
-          npm install $ARCHIVE_FILENAME
-          node esm-test.mjs
-
-  browser-usage:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - name: Setup Node.js
-        uses: actions/setup-node@v1
-        with:
-          node-version: 12.x
-      - name: Install and test
-        run: |
-          npm ci
-          npx mocha test/module-systems/browser-test.js
-
-  deno-usage:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - uses: denolib/setup-deno@master
-        with:
-          deno-version: 'v1.0.0'
-      - run: deno --version
-      - run: deno test --allow-net=deno.land test/module-systems/deno-test.ts
-
   build-output-sync:
     runs-on: ubuntu-latest