Changes

GoTrue

• Add the possibility to use Custom Tabs for OAuth/SSO on Android in #243:

install(GoTrue) {
    defaultExternalAuthAction = ExternalAuthAction.CUSTOM_TABS //defaults to EXTERNAL_BROWSER
}

• Remove default values for GoTrueConfig#scheme and GoTrueConfig#host on Android and Apple platforms. (#244)
• Add GoTrue#parseSessionFromFragment(fragment)
• Add GoTrue#parseSessionFromUrl(url)