chore!: remove node 10 support (#2596)

- conventional-changelog/commitlint#2574
- conventional-changelog/commitlint#2575
- conventional-changelog/commitlint#2582

BREAKING CHANGE: minimum node version is 12

Author: escapedcat

package.json

@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/conventional-changelog/commitlint#readme",
   "engines": {
-    "node": ">=v10"
+    "node": ">=v12"
   },
   "devDependencies": {
     "@commitlint/lint": "^12.1.4",