Feature Request: Add support for Deno

首先使用 Deno 复现所提供的 TypeScript 示例，并跟踪从 speed-test 响应中读取 transferSize 时反复出现的失败。示例能够在 Deno 下运行且不再出现这些错误，并报告已完成的 speed-test 结果时，即表示完成。

Sample code:

import { default as CFSpeedTest, ConfigOptions } from "npm:@cloudflare/[email protected]"

async function main() {
    const opts: ConfigOptions = {
    }
    const test = new CFSpeedTest(opts)
    test.onFinish = (results) => {
        console.log(results)
    }
}

if (import.meta.main) {
    await main()
}

Output:

✅ Granted read access to "C:\Users\codyc\AppData\Local\deno\npm\node_modules".
✅ Granted read access to "C:\Users\codyc\AppData\Local\deno\node_modules".
✅ Granted read access to "C:\Users\codyc\AppData\Local\node_modules".
✅ Granted read access to "C:\Users\codyc\AppData\node_modules".
✅ Granted read access to "C:\Users\codyc\node_modules".
✅ Granted read access to "C:\Users\node_modules".
✅ Granted read access to "C:\node_modules".
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=100000: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=100000: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?during=download&bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=100000: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?bytes=100000: TypeError: Cannot read properties of undefined (reading 'transferSize')
Error fetching https://speed.cloudflare.com/__down?during=download&bytes=0: TypeError: Cannot read properties of undefined (reading 'transferSize')
[etc.]