chore: update github actions

.github/workflows/lint.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
+        with:
+          node-version: 12
       - run: npm install
       - run: >
           npm install $(node -e "const deps=require('./package.json').peerDependencies;

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12, 14]
+        node-version: [12, 14, 16]
       fail-fast: false
     steps:
       - uses: actions/checkout@v2