ci: drop node 12

Author: danielroe

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node: [12, 14]
+        node: [14]
 
     steps:
       - uses: actions/setup-node@v2