Added Cordova Native Audio plugin, updated Ionic version.
chore(*): remove empty test files
test($cordovaBarcodeScanner): add unit tests
fix($cordovaVibration): replace service name in test
test($cordovaSplashscreen): add unit tests
test($cordovaSpinnerDialog): add unit tests
test($cordovaKeyboard): add unit tests
test($cordovaNetwork): add unit tests
test($cordovaPrinter): add unit tests
test($cordovaSms): add unit tests
Merge pull request #248 from mrzmyr/test-barcode-scanner

test($cordovaBarcodeScanner): add unit tests
Merge pull request #252 from mrzmyr/fix-test-service-name-vibration

fix($cordovaVibration): replace service name in test
Revert "test($cordovaBarcodeScanner): add unit tests"
Merge pull request #256 from driftyco/revert-248-test-barcode-scanner

Revert "test($cordovaBarcodeScanner): add unit tests"
Merge pull request #255 from mrzmyr/test-sms

test($cordovaSms): add unit tests
Merge pull request #250 from mrzmyr/test-spinner-dialog

test($cordovaSpinnerDialog): add unit tests
Merge pull request #254 from mrzmyr/test-printer

test($cordovaPrinter): add unit tests
Merge pull request #253 from mrzmyr/test-network

test($cordovaNetwork): add unit tests
Merge pull request #249 from mrzmyr/test-keyboard

test($cordovaKeyboard): add unit tests
Merge pull request #251 from mrzmyr/test-splashscreen

test($cordovaSplashscreen): add unit tests