build: require Node.js 14.18 or later

Support for the `node:` prefix was backported to Node.js 14 in 14.18,
which is required by eslint-plugin-unicorn.

BREAKING CHANGE: Drop support for Node.js < 14.18.

Signed-off-by: Kevin Locke <[email protected]>

Author: kevinoid

package.json

@@ -74,7 +74,7 @@
     "peer-version-check": "^0.1.0"
   },
   "engines": {
-    "node": "^14.14 || ^16",
+    "node": "^14.18 || ^16",
     "npm": ">=1.3.7"
   }
 }