Fixes a crash on some old Android devices.

This new version comes with an updated JSC runtime, so we no longer need to
depend on the updated version ourselves.

This is done at the app level, not the SDK.

Currently 2 Firebase services are used:

  - Crashlytics
  - Dynamic Links

They are enabled in tandem, if the appropriate Google services file
(GoogleService-Info.plist on iOS or google-services.json on Android) is found.

Each service needs to be individually enabled in the Firebase console.

Bumping React to 16.6.3 is a requirement for this update.

WebRTC no longer actively fixes iOS 9 issues.

The upstream package has been unmaintained for 2 years now, and making the litle
changes needed as React Native needs them is getting old. The actual
funcionality is a couple of one-liners plus tons of boliterplate, which gets
reduced by quite a bit if we just embed it. So here it goes.

It causes false positives when submitting the app to the Store. Use the new
permissions API in react-native-webrtc instead.

App Store Connect reported the following issues in (and rejected the binary
of) Jitsi Meet 1.18.x:

NSBluetoothPeripheralUsageDescription
NSAppleMusicUsageDescription
NSMotionUsageDescription
NSSpeechRecognitionUsageDescription

Starting spring 2019, all apps submitted to the App Store that access user
data will be required to include a purpose string for the following:

NSLocationAlwaysUsageDescription
NSLocationWhenInUseUsageDescription

PR https://github.com/wmcmahan/react-native-calendar-events/pull/186 has
been merged upstream.

Includes a fix for not running expensive operations on the main thread.

Use react-native-fastimage, which uses 2 full-native image impleentations using
well known and mature (native) libraries.

This gets us rid of 2 libraries which were observerd as a source of bugs and
created trouble with dependencies: react-native-fetch-blob and
react-native-img-cache. They are also no longer well maintained.

It will only be requested if a user joins a meeting or flips the switch from
video to audio and back, but never as the first thing when the welcome page is
mounted.

Syntax changed slightly with an update to CocoaPods.

Turns out sometimes a calendar is missing the tile and it crashes because nil is
inserted into a NSDictionary. Fix it by applying this pending PR:
https://github.com/wmcmahan/react-native-calendar-events/pull/164

Also bump React to 16.3.2, since it's required.

It's removed in RN >= 0.55. This aligns the project with the official
documentation: https://facebook.github.io/react-native/docs/integration-with-existing-apps.html#configuring-cocoapods-dependencies

On Android the files will be copied to the assets/sounds directory of
the SDK bundle on build time. To play the "asset:/" prefix has to be
used to locate the files correctly.

On iOS each sound file must be added to the SDK's Xcode project in order
to be bundled correctly. To playback we need to know the path of the SDK
bundle which is now exposed by the AppInfo iOS module.

Adds base/sounds feature which allows other features to register a sound
source under specified id. A new SoundsCollection component will then
render corresponding HTMLAudioElement for each such sound. Once "setRef"
callback is called by the HTMLAudioElement, this element will be added
to the Redux store. When that happens sound can be played through the
new 'playSound' action which will call play() method on the stored
HTMLAudioElement instance.

Upstream lacked a CocoaPods podspec file, PR:
https://github.com/DylanVann/react-native-locale-detector/pull/3