chore(package): update gulp-typescript
chore(package): update gulp-typescript

closes #30

caravancoop/angular2-google-maps,SebastianM/angular-google-maps,SebastianM/angular-google-maps,rc3media/angular2-google-maps,pSuwalski/angular-google-maps,eques/angular2-google-maps,SebastianM/angular2-google-maps,pSuwalski/angular-google-maps,rc3media/angular2-google-maps,adamkundrat/angular2-google-maps,SebastianM/angular2-google-maps,caravancoop/angular2-google-maps,rafalsobota/angular2-google-maps,tobper/angular2-google-maps,adamkundrat/angular2-google-maps,caravancoop/angular2-google-maps,tobper/angular2-google-maps,rafalsobota/angular2-google-maps,adamkundrat/angular2-google-maps,rafalsobota/angular2-google-maps,eques/angular2-google-maps,eques/angular2-google-maps,SebastianM/angular2-google-maps,staticint/angular2-google-maps,tobper/angular2-google-maps,staticint/angular2-google-maps,pSuwalski/angular-google-maps,staticint/angular2-google-maps,rc3media/angular2-google-maps