ci: drop support for node 10 (found not to be working)

Author: jake-low

.github/workflows/nodejs.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [10, 12, 14]
+        node: [12, 14]
         os: [ubuntu-latest]
 
     steps:

package.json

@@ -21,7 +21,7 @@
   ],
   "main": "dist",
   "engines": {
-    "node": ">=10"
+    "node": ">=12"
   },
   "scripts": {
     "version": "conventional-changelog -i changelog.md -s -r 0 && git add changelog.md",