drop support for node 8

Author: OlivierJM

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        node_version: ['8', '10', '12']
+        node_version: ['10', '12']
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v1