Update Node in Actions

Author: wooorm

Diff for: .github/workflows/main.yml

@@ -4,18 +4,18 @@ on:
   - push
 jobs:
   main:
-    name: '${{ matrix.node }}'
+    name: ${{matrix.node}}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
       - uses: dcodeIO/setup-node-nvm@master
         with:
-          node-version: ${{ matrix.node }}
+          node-version: ${{matrix.node}}
       - run: npm install
       - run: npm test
       - uses: codecov/codecov-action@v1
     strategy:
       matrix:
         node:
-          - lts/dubnium
+          - lts/erbium
           - node