fix(bootstrap): only add customProviders when present
fix(bootstrap): only add customProviders when present

manucorporat/ionic,janglednerves/ionic,manucorporat/ionic,jarrodkoch/ionic,AbraaoAlves/ionic,AbraaoAlves/ionic,jhlee8804/ionic,joshesp/ionic,alan-agius4/ionic,janglednerves/ionic,alan-agius4/ionic,jhlee8804/ionic,dennybiasiolli/ionic,TillaTheHun0/ionic,dennybiasiolli/ionic,joshesp/ionic,driftyco/ionic,jarrodkoch/ionic,jarrodkoch/ionic,alan-agius4/ionic,manucorporat/ionic,alan-agius4/ionic,driftyco/ionic,jhlee8804/ionic,manucorporat/ionic,janglednerves/ionic,manucorporat/ionic,joshesp/ionic,cambronjay/ionic,jhlee8804/ionic,AbraaoAlves/ionic,jhlee8804/ionic,jarrodkoch/ionic,dennybiasiolli/ionic,dennybiasiolli/ionic,jarrodkoch/ionic,cambronjay/ionic,TillaTheHun0/ionic,cambronjay/ionic,driftyco/ionic,dennybiasiolli/ionic,AbraaoAlves/ionic,AbraaoAlves/ionic,janglednerves/ionic,brianespinosa/ionic2-sass,janglednerves/ionic,TillaTheHun0/ionic,driftyco/ionic,driftyco/ionic,cambronjay/ionic,TillaTheHun0/ionic,cambronjay/ionic,alan-agius4/ionic,alan-agius4/ionic,joshesp/ionic