build(node): specify supported node versions

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [10.x, 12.x, 13.x, 14.x]
+        node-version: [12, 14]
 
     steps:
       - name: Checkout

package.json

@@ -74,5 +74,8 @@
   "repository": {
     "type": "git",
     "url": "https://github.com/ttshivers/synclounge.git"
+  },
+  "engines": {
+    "node": ">=12"
   }
-}
+}