Revert the license formatting, add codefactor shield

Author: alexeyinkin

LICENSE

@@ -1,5 +1,3 @@
-flutter_code_editor
-
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
@@ -202,11 +200,7 @@ flutter_code_editor
    See the License for the specific language governing permissions and
    limitations under the License.
 
---------------------------------------------------------------------------------
-code_text_field
-
-MIT License
-
+code_field:
 Copyright (c) 2021 Bertrand Bevillard
 
 Permission is hereby granted, free of charge, to any person obtaining a copy

README.md

@@ -11,6 +11,7 @@ Flutter Code Editor is a multi-platform code editor supporting:
 - And many other features.
 
 [![Pub Version](https://img.shields.io/pub/v/flutter_code_editor)](https://pub.dev/packages/flutter_code_editor)
+[![CodeFactor](https://img.shields.io/codefactor/grade/github/akvelon/flutter-code-editor?style=flat-square)](https://www.codefactor.io/repository/github/akvelon/flutter-code-editor)
 
 ![Basic Example](https://raw.githubusercontent.com/akvelon/flutter-code-editor/main/example/images/factorial.png)