BREAKING CHANGE: min supported node@18

Author: commenthol

package.json

@@ -1,6 +1,6 @@
 {
   "name": "debug-level",
-  "version": "3.3.0-0",
+  "version": "4.0.0-0",
   "description": "debug with levels",
   "keywords": [
     "debug",
@@ -115,7 +115,7 @@
     "debug": "^4.3.1"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=18"
   },
   "c4uIgnore": {
     "chalk": "^4.0.0 // ^5 is ESM only and won't work with transpiled version"