error-message: help users open an issue

Urge users to open an issue when an error occurs on a package instead of
telling them to contact the author by default.

Fixes: #9948
Credit: @trodrigues
Reviewed-By: @othiym23
PR-URL: npm/npm#10496

lib/utils/error-message.js

@@ -42,7 +42,9 @@ function errorMessage (er) {
           'not with npm itself.',
           'Tell the author that this fails on your system:',
           '    ' + er.script,
-          'You can get their info via:',
+          'You can get information on how to open an issue for this project with:',
+          '    npm bugs ' + er.pkgname,
+          'Or if that isn\'t available, you can get their info via:',
           '    npm owner ls ' + er.pkgname,
           'There is likely additional logging output above.'
         ].join('\n')]