build: update Node.js version runtime

Author: lirantal

.github/workflows/main.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        node: ['12', '14']
+        node: ['20']
     name: Node ${{ matrix.node }} (${{ matrix.platform }})
     runs-on: ${{ matrix.platform }}
     steps:
@@ -34,7 +34,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: '12'
+          node-version: '20'
       - name: install dependencies
         run: yarn install --frozen-lockfile --ignore-engines
       - name: build script