Merge branch 'master' of https://github.com/invertase/react-native-firebase into v3

# Conflicts:
#	ios/RNFirebase/admob/RNFirebaseAdMob.m
#	ios/RNFirebase/database/RNFirebaseDatabase.h
#	ios/RNFirebase/database/RNFirebaseDatabaseReference.m
#	lib/modules/admob/index.js
#	tests/ios/Podfile.lock

tests/ios/Podfile.lock

@@ -104,7 +104,7 @@ PODS:
   - React/cxxreact (0.44.3):
     - React/jschelpers
   - React/jschelpers (0.44.3)
-  - RNFirebase (2.1.0):
+  - RNFirebase (2.1.2):
     - React
   - Yoga (0.44.3.React)
 
@@ -126,11 +126,11 @@ DEPENDENCIES:
 
 EXTERNAL SOURCES:
   React:
-    :path: ../node_modules/react-native
+    :path: "../node_modules/react-native"
   RNFirebase:
-    :path: ./../../
+    :path: "./../../"
   Yoga:
-    :path: ../node_modules/react-native/ReactCommon/yoga
+    :path: "../node_modules/react-native/ReactCommon/yoga"
 
 SPEC CHECKSUMS:
   Firebase: 1492bf04e1b73a7353b4fb2cf5a20bac9692f341
@@ -151,9 +151,9 @@ SPEC CHECKSUMS:
   nanopb: 5601e6bca2dbf1ed831b519092ec110f66982ca3
   Protobuf: d582fecf68201eac3d79ed61369ef45734394b9c
   React: 6361345ebeb769a929e10a06baf0c868d6d03ad5
-  RNFirebase: aef6fb5e509449546aa65cef2efae02d903c5fce
+  RNFirebase: f796cb5ff9c09f72f181f72a8b9fd972fccc9c49
   Yoga: c90474ca3ec1edba44c97b6c381f03e222a9e287
 
 PODFILE CHECKSUM: 45666f734ebfc8b3b0f2be0a83bc2680caeb502f
 
-COCOAPODS: 1.3.1
+COCOAPODS: 1.2.1

tests/ios/ReactNativeFirebaseDemo.xcodeproj/project.pbxproj

@@ -1062,7 +1062,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n";
 			showEnvVarsInLog = 0;
 		};
 		2D02E4CB1E0B4B27006451C7 /* Bundle React Native Code And Images */ = {

tests/src/tests/database/ref/offTests.js

@@ -3,8 +3,8 @@ import sinon from 'sinon';
 
 import DatabaseContents from '../../support/DatabaseContents';
 
-function offTests({ describe, it, xcontext, context, firebase }) {
-  describe('ref().off()', () => {
+function offTests({ fdescribe, it, xcontext, context, firebase }) {
+  fdescribe('ref().off()', () => {
     it('doesn\'t unbind children callbacks', async () => {
       // Setup
 

tests/src/tests/database/ref/on/onChildAddedTests.js

@@ -1,9 +1,9 @@
 import 'should-sinon';
 import Promise from 'bluebird';
 
-export default function onChildAddedTests({ describe, beforeEach, afterEach, it, firebase }) {
-  describe('ref().on(\'child_added\')', () => {
-    describe('the snapshot', () => {
+export default function onChildAddedTests({ fdescribe, beforeEach, afterEach, it, firebase }) {
+  fdescribe('ref().on(\'child_added\')', () => {
+    fdescribe('the snapshot', () => {
       let ref;
       let childRef;
       let childVal;

tests/src/tests/database/ref/on/onTests.js

@@ -1,7 +1,7 @@
 import 'should-sinon';
 
-function onTests({ describe, it, firebase, context }) {
-  describe('ref().on()', () => {
+function onTests({ fdescribe, it, firebase, context }) {
+  fdescribe('ref().on()', () => {
     // Observed Web API Behaviour
     context('when no eventName is provided', () => {
       it('then raises an error', () => {

tests/src/tests/database/ref/on/onValueTests.js

@@ -4,8 +4,8 @@ import Promise from 'bluebird';
 
 import DatabaseContents from '../../../support/DatabaseContents';
 
-function onTests({ describe, context, it, firebase, tryCatch }) {
-  describe('ref().on(\'value\')', () => {
+function onTests({ fdescribe, context, it, firebase, tryCatch }) {
+  fdescribe('ref().on(\'value\')', () => {
     // Documented Web API Behaviour
     it('returns the success callback', () => {
       // Setup