deps: upgrade npm to 6.14.1

PR-URL: #31977
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Author: isaacs

deps/npm/AUTHORS

@@ -682,3 +682,9 @@ Zhenya Vinogradov <zhenyavinogradov@gmail.com>
 Rafael Hengles <rhengles@gmail.com>
 Jan-Philip Gehrcke <jp@opstrace.com>
 Caleb Sacks <16855387+clabe45@users.noreply.github.com>
+Kyle Getz <kgetz@arista.com>
+Sean Healy <s@xib.ca>
+Netanel Gilad <netanelg@wix.com>
+Dave Nicolson <david.nicolson@gmail.com>
+Ajay Narain Mathur <ajaynarainmathur@gmail.com>
+Vitaliy Markitanov <9357021+vit100@users.noreply.github.com>