Update dependencies

[DatLag]

Use

implementation 'androidx.appcompat:appcompat:1.1.0-alpha01'
implementation 'androidx.recyclerview:recyclerview:1.1.0-alpha01'

instead of

compile "com.android.support:appcompat-v7:$supportLibrary"
compile "com.android.support:recyclerview-v7:$supportLibrary"

[DatLag]

#59