fix: require at least node v14 (#546)

Author: brc-dd

package.json

@@ -43,7 +43,7 @@
     "ci-docs": "run-s build docs-build"
   },
   "engines": {
-    "node": ">=12.0.0"
+    "node": ">=14.0.0"
   },
   "gitHooks": {
     "pre-commit": "lint-staged"