deps: manually add 10.x support to npm

Currently npm explicitly doesn't support 10.x and will fail on master.
This patch manually adds support for 10.x so that we can keep an up to
date version of npm on master.

refs: #17535
Backport-PR-URL: #19560
PR-URL: #17777
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>

Author: MylesBorins

deps/npm/lib/utils/unsupported.js

@@ -5,7 +5,8 @@ var supportedNode = [
   {ver: '6', min: '6.0.0'},
   {ver: '7', min: '7.0.0'},
   {ver: '8', min: '8.0.0'},
-  {ver: '9', min: '9.0.0'}
+  {ver: '9', min: '9.0.0'},
+  {ver: '10', min: '10.0.0'}
 ]
 var knownBroken = '<4.7.0'