[release] 1.53.8 - Add a keys getter for configs, layers and param stores (#403)

### Improvements
  - Add a keys getter for configs, layers and param stores






>Included In This Release
>- f47c600 Andre Terron
> - Add keys getters to dynamic configs, layers and param stores (#402)

Author: andre-statsig

Sources/Statsig/DeviceEnvironment.swift

@@ -7,7 +7,7 @@ struct DeviceEnvironment {
 
     static internal let deviceOS = PlatformCompatibility.deviceInfo.os
     static internal let sdkType: String = "ios-client"
-    static internal let sdkVersion: String = "1.53.7"
+    static internal let sdkVersion: String = "1.53.8"
 
     let lock = NSLock()
     var sessionID: String? { UUID().uuidString }

Statsig.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |spec|
 
   spec.name         = "Statsig"
-  spec.version      = "1.53.7"
+  spec.version      = "1.53.8"
   spec.summary      = "Statsig enables developers to ship code faster and more safely."
   spec.description  = <<-DESC
                    Statsig enables developers to ship code faster and more safely by providing: