update yarn cache

Author: chenxsan

.github/workflows/build.yml

@@ -20,12 +20,17 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
 
-      - name: Cache node_modules
-        uses: actions/cache@v2
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
+      - uses: actions/cache@v2
+        id: yarn-cache
         with:
-          path: |
-            **/node_modules
-          key: ${{ runner.os }}-${{ hashFiles('**/lockfiles') }}
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
 
       - run: yarn --frozen-lockfile
       - run: yarn lint:js