fix(flow) - Make InAppBrowserOptions exact typed

[ronal2do]

Flow are complaining about the exact types, this small PR should fix this issue

Error ┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈┈ node_modules/react-native-inappbrowser-reborn/types.js:65:35

Flow cannot determine a type for InAppBrowserOptions [1]. InAppBrowseriOSOptions [2] is inexact, so it may contain
toolbarColor with a type that conflicts with toolbarColor's definition in InAppBrowserAndroidOptions [3]. Can you make
InAppBrowseriOSOptions [2] exact?.

     62│   showInRecents?: boolean,
     63│ };
     64│
 [1] 65│ export type InAppBrowserOptions = {
 [3] 66│   ...InAppBrowserAndroidOptions,
 [2] 67│   ...InAppBrowseriOSOptions
     68│ };
     69│
     70│ export type AuthSessionResult = RedirectResult | BrowserResult;
     71│

PR Checklist

• The PR title follows our guidelines: https://github.com/proyecto26/react-native-inappbrowser/blob/master/CONTRIBUTING.md#pull-request-process.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
• All existing tests are passing
• Tests for the changes are included

What is the current behavior?

What is the new behavior?

Fixes/Implements/Closes #[Issue Number].

[jdnichollsc]

I'm going to fix the type issue from develop, thanks for your help mate! <3