Release v2.0.4

1. Change the block data field
2. Update README.md
3. Optimize annotations

Release v2.0.3

1. Slide captcha supports y-axis randomization.
2. Optimize the rotation captcha.

Release v2.0.2

1. Add ToBase64Data() method.
2. Add error return to the ToBase64() method.

Release v2.0.1

Release v2.0.1

Release v2.0.0

Release v2.0.0

v2.0.0-beta.2

v2.0.0-beta.2

Release version 1.2.5

Optimize the display of captcha font, update the default captcha size, and add captcha quality configuration

Release version 1.2.1

Set built-in default fonts and pictures

Release version 1.1.8

Release version 1.1.8

Release version 1.1.5

Release version 1.1.5