Update actions/cache action to v2 (#711)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
       - name: Cache node_modules
-        uses: actions/cache@v1.1.0
+        uses: actions/cache@v2.1.2
         with:
           path: node_modules
           key: node_modules

.github/workflows/e2e.yml

@@ -13,12 +13,12 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: Cache build
-        uses: actions/cache@v1.1.0
+        uses: actions/cache@v2.1.2
         with:
           path: build
           key: build
       - name: Cache node_modules
-        uses: actions/cache@v1.1.0
+        uses: actions/cache@v2.1.2
         with:
           path: node_modules
           key: node_modules

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
       - name: Cache node_modules
-        uses: actions/cache@v1.1.0
+        uses: actions/cache@v2.1.2
         with:
           path: node_modules
           key: node_modules