add upper bound for sdk in pubspec.yaml

.gitignore

@@ -4,4 +4,4 @@
 .pub/
 build/
 pubspec.lock
-.packages
+/.packages

example/pubspec.yaml

@@ -3,7 +3,7 @@ description: Demonstrates how to use the flutter_ffmpeg plugin.
 publish_to: 'none'
 
 environment:
-  sdk: ">=2.0.0-dev.68.0"
+  sdk: ">=2.0.0-dev.68.0 <3.0.0"
 
 dependencies:
   flutter:

flutter_ffmpeg.iml

@@ -11,7 +11,6 @@
       <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/example/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/ios/.symlinks/plugins/flutter_ffmpeg/packages" />
       <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/flutter_assets/packages" />
       <excludeFolder url="file://$MODULE_DIR$/packages" />
     </content>

pubspec.yaml

@@ -5,7 +5,7 @@ author: Taner Sener <tanersener@gmail.com>
 homepage: https://github.com/tanersener/flutter-ffmpeg
 
 environment:
-  sdk: ">=2.0.0-dev.68.0"
+  sdk: ">=2.0.0-dev.68.0 <3.0.0"
 
 dependencies:
   flutter: