create a character avatar
npm install char-avatar#### Usage
``js
import { CharAvatar } from "char-avatar"
``
#### Params
str: string,
width: number,
bgColor?: string,
textColor?: string,
bgColors?: string[], //bgColors are already preset, you can customize it
cornerRadius?: number,
fontWeight?: number,
fontScale?: number,
pictureResolution?: number,