deps: upgrade npm to 7.6.0

PR-URL: #37559
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

Author: ruyadorno

deps/npm/.npmignore

@@ -16,6 +16,7 @@ node_modules/npm-registry-mock
 
 # don't need these in the npm package.
 html/*.png
+docs/nav.yml
 
 # don't ignore .npmignore files
 # these are used in some tests.

deps/npm/AUTHORS

@@ -753,3 +753,5 @@ Alexander Riccio <test35965@gmail.com>
 RA80533 <32469082+RA80533@users.noreply.github.com>
 Ikko Ashimine <eltociear@gmail.com>
 MrBrain295 <66077254+MrBrain295@users.noreply.github.com>
+kumavis <aaron@kumavis.me>
+Christof Lemke <christoflemke@github.com>