Use Node 14 in workflows

Author: alexesprit

.github/workflows/lint.yml

@@ -12,6 +12,6 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14'
       - run: npm install
       - run: npm run lint

.github/workflows/test.yml

@@ -12,6 +12,6 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '12.x'
+          node-version: '14'
       - run: npm install
       - run: npm test