adb-v0.1.1

Different QOL improvements (#92)

• maestrO_test: improve docs

• AutomatorServer: add doubleTap()

• maestro_test: add double tap

• maestro_test: add MaestroTester.dragUntilVisible

• rearrange code

• make $ accept Key

• maestro_test: automatically call pumpAndSettle() after dragUntilVisible()

• MaestroTester.dragUntilVisible: select the first finder by default

• add sleep parameter for maestroTest()

• make forwarded methods of MaestroTester accept less arguments

• break custom_selectors into few files

• add more doc comments

• add more docs

• maestroTest: don't sleep by default

• add additional test cases for find.byKey

• add Key as supported type to ArgumentError