🤖 chore(.gitignore): Add leading slash to ignored .nyc_output directory.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/a44c42967442d65fd14272682fb84a6f32feb841/src/transforms/gitignore:fix-nyc-output.js
Please contact the author of the transform if you believe there was an error.

Author: a-flying-potato

.gitignore

@@ -10,7 +10,7 @@ jspm_packages
 
 # Coverage directory used by nyc
 /coverage
-.nyc_output
+/.nyc_output
 
 # Documentation
 /gh-pages