rich_input 1.2.1

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

[1.2.1] 2020-8-11

• Incompatible modification: RichBlock becomes non-const type.

• Add special character filtering, these special characters will cause input field deletion to be invalid.

• Optimize the problem that the insert position is not correct when the input box loses focus

[1.1.3] 2020-7-15

• Fixed: Fixed a bug where characters could not be displayed in some cases

• Fixed: Fix matching error when string is special character

[1.1.1] 2020-7-11

• Fixed: Two characters will be deleted on huawei

• Fixed: Using insertText method may cause a bug with wrong cursor

[1.1.0] 2020-7-9

• New: Can delete the entire block character with one key

[1.0.3] 2020-7-9

• Fix known bugs

[1.0.2] 2020-7-3

• Modify the method addBloack to insertBlock.
• New insertText method to insert text based on cursor position.

[1.0.1] 2020-7-2

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