1.9.0

• Updated Gradle version for Android build (by @ravijadav812)
• Fixed ios swift compile errors (by @ltOgt)
• File path errors are logged instead of crashing (by @kreativityapps)
• Handle mailto links (by @dab246)
• In some Android apps (e.g. Strava), the text may be included in EXTRA_TEXT
  when ACTION_SEND_MULTIPLE is used (by @hidea)
• Added support for PDF files on iOS (by @Gibbo97)