flutter_rich_input 1.2.0

Rich input box, implement @someone and subject with color highlighting.

[1.2.0] - 2020-7-2

• flutter_rich_input is no longer maintained and uses a better way to enable a rich_input plugin, click here to see it!

[1.1.4] - 2020-6-18

• Fix some warnings

[1.1.3] - 2020-6-12

• Fix addBlock position error when not getting focus

[1.1.2] - 2020-5-20

• Fix a display error caused by deleting text during composing

[1.1.1] - 2020-5-17

• Add delText method

[1.0.0] - 2020-5-16

• Support Highlighting
• Support @someone
• Support #subject
• Supports block deletion
• Based on native textfield, less damage to textfield