chore(package): remove node 12 from engines field

importing node:fs and node:path in commonjs does not work in node 12
dependency synckit also does no longer support node 12

Author: Rialgar

package.json

@@ -12,7 +12,7 @@
   "license": "ISC",
   "packageManager": "[email protected]",
   "engines": {
-    "node": "^12.20.0 || ^14.18.0 || >=16.0.0"
+    "node": "^14.18.0 || >=16.0.0"
   },
   "main": "lib/index.cjs",
   "module": "lib/index.js",