Fix web info

[GabrielRozendo]

Related to item 3 in #13. Quoting:

3. Fix web info

In web is flagging OS as unknown.
In package DeviceInfoPlugin has the implementation for web platform, check out in pub.dev example

Already change to use the webBrowserInfo

The issue here is the version part as the web provides not a clear single option to use.

In documentation has these info:

 Map<String, dynamic> _readWebBrowserInfo(WebBrowserInfo data) {
    return <String, dynamic>{
      'browserName': data.browserName.name,
      'appCodeName': data.appCodeName,
      'appName': data.appName,
      'appVersion': data.appVersion,
      'deviceMemory': data.deviceMemory,
      'language': data.language,
      'languages': data.languages,
      'platform': data.platform,
      'product': data.product,
      'productSub': data.productSub,
      'userAgent': data.userAgent,
      'vendor': data.vendor,
      'vendorSub': data.vendorSub,
      'hardwareConcurrency': data.hardwareConcurrency,
      'maxTouchPoints': data.maxTouchPoints,
    };
  }

Here is my debug value:

We could use the appVersion but still not so clear and simple.
And yet we should limit it to 100 max chars as server defined.
39: osInfo.version.substring(0, 100),