deps: fix npm doctor tests for pre-release node

Refs: npm/cli#2358

PR-URL: #36543
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruy Adorno <ruyadorno@github.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

Author: nlf

deps/npm/test/lib/doctor.js

@@ -479,7 +479,7 @@ test('npm doctor outdated nodejs version', t => {
   npm.globalDir = dir
   npm.localBin = dir
   npm.globalBin = dir
-  nodeVersions.push({ version: process.version.replace(/\d+$/, '999'), lts: false })
+  nodeVersions.push({ version: process.version.replace(/\d+(-.*)?$/, '999'), lts: false })
   const consoleError = console.error
   // we just print an empty line here, so swallow it and ignore
   console.error = () => {}