build: Updating grunt-banana-checker to 0.11.1

Change-Id: Ibdf73d140287e7cc01fd5fe2ee69fd4eab0cc979
Reviewed-on: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CSS/+/1000635
Tested-by: jenkins-bot
Reviewed-by: Libraryupgrader <tools.libraryupgrader@tools.wmflabs.org>
2 files changed