Update composer.json to allow for laravel 4.2
Update composer.json to allow for laravel 4.2

Updated composer.json to allow the use of laravel 4.2.

CodeSleeve/laravel-stapler,neerajgoyal12/laravel-stapler,flaxandteal/laravel-stapler,AndreasHeiberg/laravel-stapler,sleepless/laravel-stapler,InMoji/laravel-stapler,oschettler/laravel-stapler,aozisik/laravel-stapler,expstudio/lumen-stapler,HipsterCreative/laravel-stapler