Simplify dependency caching on CI and upgrade actions (#1617)

Author: ddzz

.github/workflows/size.yml

@@ -6,7 +6,7 @@ jobs:
     env:
       CI_JOB_NUMBER: 1
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - uses: andresz1/size-limit-action@v1
         with:
           directory: packages/toolkit

.github/workflows/tests.yml

@@ -18,15 +18,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Use node ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
-
-      - uses: actions/cache@v2
-        with:
-          path: .yarn/cache
-          key: yarn-${{ hashFiles('yarn.lock') }}
-          restore-keys: yarn-
+          cache: 'yarn'
 
       - name: Install deps
         run: yarn install
@@ -52,15 +47,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Use node ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
-
-      - uses: actions/cache@v2
-        with:
-          path: .yarn/cache
-          key: yarn-${{ hashFiles('yarn.lock') }}
-          restore-keys: yarn-
+          cache: 'yarn'
 
       - name: Install deps
         run: yarn install
@@ -95,15 +85,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Use node ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
-
-      - uses: actions/cache@v2
-        with:
-          path: .yarn/cache
-          key: yarn-${{ hashFiles('yarn.lock') }}
-          restore-keys: yarn-
+          cache: 'yarn'
 
       - name: Install deps
         run: yarn install