feat: add shape parameter

[ArgoZhang]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like
add a option maybe named shape the default value is retangle

• retangle
• circle
• square

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

additional

[fengyuanchen]

You can implement it by yourself, such as https://fengyuanchen.github.io/cropperjs/examples/crop-a-round-image.html

[ArgoZhang]

@fengyuanchen need Rounded rectangle too. should be a parameter set the round radius