Readd cache step.

Author: GirlBossRush

.github/workflows/ci.yaml

@@ -108,14 +108,14 @@ jobs:
         with:
           node-version: "14"
 
-      # - name: Fetch dependencies from cache
-      #   id: cache-yarn
-      #   uses: actions/cache@v2
-      #   with:
-      #     path: "**/node_modules"
-      #     key: yarn-build-${{ hashFiles('**/yarn.lock') }}
-      #     restore-keys: |
-      #       yarn-build-
+      - name: Fetch dependencies from cache
+        id: cache-yarn
+        uses: actions/cache@v2
+        with:
+          path: "**/node_modules"
+          key: yarn-build-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            yarn-build-
 
       - name: Install dependencies
         # if: steps.cache-yarn.outputs.cache-hit != 'true'