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#### Describe the bug
Some servers are not sending a zlib header in their deflated data. CURL had the same problem and implemented a "fix" for it: https://github.com/curl/curl/blob/5c932f8fe9dad94a7417702958ffa9e8db67c549/lib/content_encoding.c#L227-L229

Axios is also returning a `Z_DATA_ERROR` in this case.

#### To Reproduce

Use axios to request a page without a zlib header in the deflated data (e.g. https://www.konicaminolta.eu/eu-en/about-us/corporate-book) and force it to only accept deflate encoding.

```js
let url = 'https://www.konicaminolta.eu/eu-en/about-us/corporate-book';
let config = {
  headers: { 'Accept-Encoding': 'deflate' }
};

await axios.get(url, config);
```

#### Expected behavior

Getting the correctly inflated data.

#### Environment
 - Axios Version [0.21.1]


#### Additional context/Screenshots


lib/adapters/http.js
customErr.url = config.url;
      customErr.exists = true;
      return reject(customErr);
    }
    headers.set(
      'Accept-Encoding',
      'gzip, compress, deflate' + (isBrotliSupported ? ', br' : ''), false
      );
    const options = {
      path,
      method: method,
      headers: headers.toJSON(),
      agents: { http: config.httpAgent, https: config.httpsAgent },
      auth,
      protocol,
      beforeRedirect: dispatchBeforeRedirect,
      beforeRedirects: {}
    };
    if (config.socketPath) {
      options.socketPath = config.socketPath;
    } else {
      options.hostname = parsed.hostname;
      options.port = parsed.port;
      setProxy(options, config.proxy, protocol + '//' + parsed.hostname + (parsed.port ? ':' + parsed.port : '') + options.path);
    }
    let transport;
    const isHttpsRequest = isHttps.test(options.protocol);
    options.agent = isHttpsRequest ? config.httpsAgent : config.httpAgent;
    if (config.transport) {
      transport = config.transport;