Prepare for release 3.7.0-beta.4.

Author: f2prateek

Analytics.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = "Analytics"
-  s.version          = "3.7.0-beta.3"
+  s.version          = "3.7.0-beta.4"
   s.summary          = "The hassle-free way to add analytics to your iOS app."
 
   s.description      = <<-DESC

Analytics/Classes/SEGAnalytics.m

@@ -416,7 +416,7 @@ + (void)debug:(BOOL)showDebugLogs
 
 + (NSString *)version
 {
-    return @"3.7.0-beta.3";
+    return @"3.7.0-beta.4";
 }
 
 #pragma mark - Helpers

CHANGELOG.md

@@ -1,6 +1,12 @@
 Change Log
 ==========
 
+Version 3.7.0-beta.4 *(19th June, 2019)*
+-----------------------------------------
+ * [Fix](https://github.com/segmentio/analytics-ios/pull/812): Remove invalid `.clang-format` symlink which can cause issues with manual builds.
+ * [Fix](https://github.com/segmentio/analytics-ios/pull/806): Collect `context.device.type` as `ios`.
+ * [Fix](https://github.com/segmentio/analytics-ios/pull/815): Fix Xcode warning.
+
 Version 3.7.0-beta.3 *(10th January, 2018)*
 --------------------------------------------
  * [Fix](https://github.com/segmentio/analytics-ios/pull/799): Allow setting anonymousId