ci: cache node_modules

.github/workflows/lint.yml

@@ -17,5 +17,9 @@ jobs:
     - uses: actions/setup-node@v1
       with:
         node-version: 12.x
+    - uses: actions/cache@v2
+      with:
+        path: '**/node_modules'
+        key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
     - run: yarn install
     - run: yarn lint

.github/workflows/test.yml

@@ -75,6 +75,10 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
+    - uses: actions/cache@v2
+      with:
+        path: '**/node_modules'
+        key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
     - name: Install dependencies
       run: yarn install
     - name: Check yarn.lock