fix(install): instruct to use npm explore in non-git repo warning (#105)

Author: Tapppi

lib/install.js

@@ -69,7 +69,7 @@ function warnAboutGit() {
   console.warn( // eslint-disable-line no-console
     'This does not seem to be a git project.\n' +
     'Although ghooks was installed, the actual git hooks have not.\n' +
-    'Run "git init" and then "npm run ghooks install".\n\n' +
+    'Run "git init" and then "npm explore ghooks -- npm run install".\n\n' +
     'Please ignore this message if you are not using ghooks directly.'
   )
 }