Version file change in the Flutter SDK

[jwren]

With flutter/flutter#172793

The Flutter IJ needs to check for a version at <FLUTTER_ROOT>/bin/cache/flutter.version.json, instead <FLUTTER_ROOT>/version.

flutter-intellij/src/io/flutter/sdk/FlutterSdkVersion.java

Line 97 in 4c7dcef

return readFromFile(sdkHome.findChild("version"));