bump to 2.4.2
Merge pull request #805 from jackmcdade/master

Bump to version 2.4.2
Fixed broken indent in Sealab
Merge pull request #820 from maxgoedjen/master

Fixed broken indent in Sealab
Remove trailing slash from url

Fixes #815
Merge branch 'master' of github.com:github/hubot-scripts
Merge branch 'master' of https://github.com/github/hubot-scripts