r_scan 0.1.6+1

A flutter plugin about qr code scan,it can scan from file, url, memory and camera qr code.

0.1.6+1 fix issues #52.

0.1.6 sound null safety and WKWebView.

0.1.5 fix ssl and rotate scan problem.

0.1.4+2 fix point problem.

0.1.4 add RScanCamera.

0.1.3 add the barcode type and the point in result.

0.1.2 fix android camera draw.

0.1.1 add turn on / turn off flash lamp and get flash lamp status.

0.1.0 add ios platform and finish.

0.0.1 init project,and android platform finish.