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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
if (isDone) return;
      isDone = true;
      if (isRejected) {
        rejected = true;
        onFinished();
      }
      isRejected ? rejectPromise(value) : resolvePromise(value);
    }
    const resolve = function resolve(value) {
      done(value);
    };
    const reject = function reject(value) {
      done(value, true);
    };
    function abort(reason) {
      emitter.emit('abort', !reason || reason.type ? new CanceledError(null, config, req) : reason);
    }
    emitter.once('abort', reject);
    if (config.cancelToken || config.signal) {
      config.cancelToken && config.cancelToken.subscribe(abort);
      if (config.signal) {
        config.signal.aborted ? abort() : config.signal.addEventListener('abort', abort);
      }
    }
    
    const fullPath = buildFullPath(config.baseURL, config.url);
    const parsed = new URL(fullPath);
    const protocol = parsed.protocol || supportedProtocols[0];
    if (protocol === 'data:') {
      let convertedData;