util: runtime deprecate util.isArray

PR-URL: #50488
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

doc/api/deprecations.md

@@ -964,6 +964,9 @@ The [`tls.SecurePair`][] class is deprecated. Please use
 
 <!-- YAML
 changes:
+  - version: REPLACEME
+    pr-url: https://github.com/nodejs/node/pull/50488
+    description: Runtime deprecation.
   - version:
     - v6.12.0
     - v4.8.6
@@ -976,7 +979,7 @@ changes:
     description: Documentation-only deprecation.
 -->
 
-Type: Documentation-only
+Type: Runtime
 
 The [`util.isArray()`][] API is deprecated. Please use `Array.isArray()`
 instead.

lib/util.js

@@ -388,7 +388,9 @@ module.exports = {
   getSystemErrorName,
   inherits,
   inspect,
-  isArray: ArrayIsArray,
+  isArray: deprecate(ArrayIsArray,
+                     'The `util.isArray` API is deprecated. Please use `Array.isArray()` instead.',
+                     'DEP0044'),
   isBoolean,
   isBuffer,
   isDeepStrictEqual(a, b) {