ci: remove node 12 due to semantic-release requirements

Author: nodkz

.github/workflows/nodejs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [14.x, 16.x]
     steps:
       - uses: actions/checkout@v2
       - name: Use Node.js ${{ matrix.node-version }}
@@ -28,7 +28,7 @@ jobs:
         env:
           CI: true  
       - name: Send codecov.io stats
-        if: matrix.node-version == '12.x'
+        if: matrix.node-version == '14.x'
         run: bash <(curl -s https://codecov.io/bash) || echo ''
 
   publish:
@@ -37,10 +37,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Use Node.js 12
+      - name: Use Node.js 14
         uses: actions/setup-node@v1
         with:
-          node-version: 12.x
+          node-version: 14.x
       - name: Install node_modules
         run: yarn install
       - name: Build