use node 14 in lint action

.github/workflows/lint.yml

@@ -8,10 +8,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - name: install node v12
+      - name: install node v14
         uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 14
       - name: yarn install
         run: yarn install
       - name: eslint