fix: do not parse id as number in any case

[jakex7]

Summary

When using SvgXml or SvgCss, an id attribute gets converted into a number instead of a string, which causes a crash because the native side expects a string value.

import {SvgXml} from 'react-native-svg';
import {SvgCss} from 'react-native-svg/css';

Test Plan

This example should not crash:

import {SvgCss} from 'react-native-svg/css';

const svgXml = `
<svg width="100" height="100" viewBox="0 0 100 100">
  <filter x="0%" y="0%" width="100" height="100" id="0123456789">
    <feFlood flood-color="red" />
  </filter>
  <circle cx="50" cy="50" r="50" filter="url(#0123456789)" />
</svg>
`;

function Example() {
  return <SvgCss xml={svgXml} />;
}