Version updated and dartdocs added

lib/barcode_scan.dart

@@ -2,10 +2,22 @@ import 'dart:async';
 
 import 'package:flutter/services.dart';
 
+/// Barcode scanner plugin
+/// Simply call `var barcode = await BarcodeScanner.scan()` to scan a barcode
 class BarcodeScanner {
+  /// If the user has not granted the access to the camera this code is thrown.
   static const CameraAccessDenied = 'PERMISSION_NOT_GRANTED';
+
+  /// If the user cancel the scan an exception with this code is thrown.
   static const UserCanceled = 'USER_CANCELED';
+
+  /// The method channel
   static const MethodChannel _channel =
       const MethodChannel('de.mintware.barcode_scan');
+
+  /// Starts the camera for scanning the barcode, shows a preview window and
+  /// returns the barcode if one was scanned.
+  /// Can throw an exception.
+  /// See also [CameraAccessDenied] and [UserCanceled]
   static Future<String> scan() async => await _channel.invokeMethod('scan');
 }

pubspec.yaml

@@ -1,6 +1,6 @@
 name: barcode_scan
 description: A flutter plugin for scanning 2D barcodes and QRCodes via camera.
-version: 1.0.0
+version: 2.0.0
 homepage: https://github.com/mintware-de/flutter_barcode_reader
 
 dependencies: