Add support for setting an onError prop on SvgCssUri

[SjaakSchilperoort]

Summary

In PR #1266, support was added for setting an onError property on SvgUri. This PR adds the same to SvgCssUri.

Test Plan

This should now work:

import React, {Component} from 'react';
import {  SvgCssUri } from 'react-native-svg';

class Example extends Component {

    state={
      uri: 'https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/xruby.svg',
    }

    render() {
        return (
            <SvgCssUri width={100} onError={() => this.setState({uri: 'https://dev.w3.org/SVG/tools/svgweb/samples/svg-files/ruby.svg'})} height={100} uri={this.state.uri} />
        );
    }
}

What's required for testing (prerequisites)?

What are the steps to reproduce (after prerequisites)?

Compatibility

OS	Implemented
iOS	✅❌
Android	✅❌

Checklist

• I have tested this on a device and a simulator
• I added documentation in README.md
• I updated the typed files (typescript)
• I added a test for the API in the __tests__ folder

Note

This PR is on request from @WoLewicki in PR #1503.

[WoLewicki]

Also, could you add a test example in TestsExample app with those simple code snippets?

[WoLewicki]

Is it ready to be merged in your opinion @SjaakSchilperoort ?

[SjaakSchilperoort]

I looked into adding example code in TestsExample, but I think it makes more sense to document the use of onError in README.md. If you agree I can add an example there, but otherwise I'm fine with this change.

[WoLewicki]

If it is possible, I would opt for including both documentation and a test in TestsExample.

[SjaakSchilperoort]

If it is possible, I would opt for including both documentation and a test in TestsExample.

Done

[WoLewicki]

LGTM 🎉 Thanks for your contribution!