chore(): use exclude in tsconfig
chore(): use exclude in tsconfig

Otherwise not all source files are typechecked by IDEs (tests, demos,
etc.)

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