Update getPreviewSize return type to Size

2.4.5

Update getPreviewSize return type to Size

Update CodeScanner.java

added the getPreviewSize() function to CodeScanner.java

Update CodeScannerView.java

added the getPreviewSize()

Update build configuration and add Kotlin support

2.4.2

Update build configuration and add Kotlin support

Update minSdk to 21

2.4.1

Update minSdk to 21

Add QR code detection highlight feature

2.4.0

Add QR code detection highlight feature

Add scanline animation customization

2.3.9

Add scanline animation customization

Add scanline feature

2.3.8

Add scanline feature

2.3.7

fix rotated front camera