Upgrade builder and implement caching

.github/workflows/main.yml

@@ -127,13 +127,34 @@ jobs:
   buildForWebGL:
     name: Build for StandaloneWindows64 🗗
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        projectPath:
+          - test-project
+        unityVersion:
+          - 2019.2.11f1
+        targetPlatform:
+          - StandaloneOSX # Build a macOS standalone (Intel 64-bit).
+          - StandaloneWindows64 # Build a Windows 64-bit standalone.
+          - StandaloneLinux64 # Build a Linux 64-bit standalone.
+          - iOS # Build an iOS player.
+          - WebGL # WebGL.
+
     steps:
       - uses: actions/checkout@v1
-      - uses: webbertakken/unity-builder@v0.8
+      - uses: actions/cache@v1.1.0
         with:
-          projectPath: test-project
-          unityVersion: 2019.2.11f1
-          targetPlatform: StandaloneWindows64
+          path: ${{ matrix.projectPath }}/Library
+          key: Library-${{ matrix.projectPath }}-${{ matrix.targetPlatform }}
+          restore-keys: |
+            Library-${{ matrix.projectPath }}-
+            Library-
+      - uses: webbertakken/unity-builder@v0.9
+        with:
+          projectPath: ${{ matrix.projectPath }}
+          unityVersion: ${{ matrix.unityVersion }}
+          targetPlatform: ${{ matrix.targetPlatform }}
       - uses: actions/upload-artifact@v1
         with:
           name: Build