Merge branch 'master-koin' into feature/clean_architecture_koin

# Conflicts:
#	app/build.gradle
#	app/src/main/java/com/rootstrap/android/ui/activity/main/SignInActivityViewModel.kt
#	app/src/main/java/com/rootstrap/android/ui/activity/main/SignUpActivityViewModel.kt
#	app/src/main/java/com/rootstrap/android/util/UtilModule.kt
#	app/src/test/java/com/rootstrap/android/SignInActivityViewModelTest.kt
#	app/src/test/java/com/rootstrap/android/SignUpActivityViewModelTest.kt
#	app/src/test/java/com/rootstrap/android/test/UnitTestBase.kt

Author: aguskoll