Revert "ci: use node@14"

This reverts commit a87ecf2.

Author: EndBug

.github/workflows/test.yml

@@ -13,9 +13,6 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
-        with:
-          node-version: '14'
       - run: npm install
 
       - name: Run tests
@@ -29,9 +26,6 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
-        with:
-          node-version: '14'
       - run: npm install
       - run: npm run lint
 
@@ -40,9 +34,6 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
-        with:
-          node-version: '14'
       - run: npm install
       - run: npm run webpack