feature request: Set userInfo once

[angelxmoreno]

Is your feature request related to a problem? Please describe.
It would be nice if we could set default params on the instance of the tracker and have it use those values on subsequent calls.

Describe the solution you'd like
have the constructor take in a userInfo object that it merges with the params sent to the matomo server.

Describe alternatives you've considered
Currently, I need to make a series of async calls to populate the userInfo object. Setting them once would improve app performance.

Additional context
none

[donni106]

Good point! This would make it even more straight forward to use.

[angelxmoreno]

as part of this PR I'd like to add userInfo defaults. Here are a few mentioned in #13

import {Dimensions} from "react-native";
import Constants from "expo-constants";
import * as Localization from "expo-localization";
{
  lang: Localization.locale,
  res: `${Dimentions.get('screen').width}x${Dimentions.get('screen').height}`,
  ua: await Constants.getWebViewUserAgentAsync(),
  _id: Constants.sessionId,
}