flutter_tts_tizen 1.2.1

The tizen implementation of flutter_tts plugin.

1.2.1

• Refactor the C++ code.

1.2.0

• Fix a bug where setLanguage() wasn't invoked due to typo in setLanguage.
• Update flutter_tts to 3.2.2 and update the example app.
• Support setVolume().
• Minor cleanups.

1.1.1

• Fix calling onCancel in a successful situation and refactor native implementations.

1.1.0

• All APIs now return valid values (0, 1, empty list, and etc.).

1.0.1

• Stabilize speaking states management.

1.0.0

• Initial release.