[ios] Update Podspecs and changelog for 4.11.2 release (#15258)

Author: Julian Rex

platform/ios/CHANGELOG.md

@@ -2,6 +2,11 @@
 
 Mapbox welcomes participation and contributions from everyone. Please read [CONTRIBUTING.md](../../CONTRIBUTING.md) to get started.
 
+## 4.11.2 - July 30, 2019
+
+* Fixed a map update bug caused by the render tiles and the render passes becoming unsynchronized. ([#15092](https://github.com/mapbox/mapbox-gl-native/pull/15092))
+* Fixed a custom geometry source bug caused by using the outdated tiles after style update. ([#15112](https://github.com/mapbox/mapbox-gl-native/pull/15112))
+
 ## 4.11.1 - July 18, 2019
 
 * Fixed a bug in telemetry collection. ([#15161](https://github.com/mapbox/mapbox-gl-native/pull/15161))

platform/ios/Mapbox-iOS-SDK-snapshot-dynamic.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |m|
 
-  version = '4.11.1'
+  version = '4.11.2'
 
   m.name    = 'Mapbox-iOS-SDK-snapshot-dynamic'
   m.version = "#{version}-snapshot"

platform/ios/Mapbox-iOS-SDK-stripped.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |m|
 
-  version = '4.11.1'
+  version = '4.11.2'
 
   m.name    = 'Mapbox-iOS-SDK-stripped'
   m.version = "#{version}-stripped"

platform/ios/Mapbox-iOS-SDK.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |m|
 
-  version = '4.11.1'
+  version = '4.11.2'
 
   m.name    = 'Mapbox-iOS-SDK'
   m.version = version