Updates Leek to fix reporting of OSX versions
Add preBuild hook for addons (Resolves #2410)
Fix camelCasing in builder tests
Merge pull request #2411 from brittanystoroz/feature/addon_prebuild_hook

Add preBuild hook for addons (Resolves #2410)
Merge pull request #2390 from twokul/update-leek

Updates Leek to fix reporting of OSX versions