chore: use v12

Author: jscottsmith

.github/workflows/main.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x]
+        node-version: [12.x]
     steps:
       - uses: actions/checkout@v1
       - name: Use Node.js ${{ matrix.node-version }}