chore: prepare for 3.9.0 release. (#286)

Author: ozayr-zaviar

CHANGELOG.md

@@ -1,5 +1,22 @@
 # Optimizely Ruby SDK Changelog
 
+## 3.9.0
+September 16, 2021
+
+### New Features:
+- Add new public properties to `OptimizelyConfig`. ([#285](https://github.com/optimizely/ruby-sdk/pull/285))
+	- sdkKey
+ 	- environmentKey
+	- attributes
+	- audiences
+	- events
+	- experimentRules and deliveryRules to `OptimizelyFeature`
+	- audiences to `OptimizelyExperiment`
+- For details, refer to our documentation page: [https://docs.developers.optimizely.com/full-stack/v4.0/docs/optimizelyconfig-ruby](https://docs.developers.optimizely.com/full-stack/v4.0/docs/optimizelyconfig-ruby).
+
+### Deprecated:
+- `OptimizelyFeature.experimentsMap` of `OptimizelyConfig` is deprecated as of this release. Please use `OptimizelyFeature.experimentRules` and `OptimizelyFeature.deliveryRules`. ([#285](https://github.com/optimizely/ruby-sdk/pull/285))
+
 ## 3.8.1
 August 2nd, 2021
 

lib/optimizely/version.rb

@@ -17,5 +17,5 @@
 #
 module Optimizely
   CLIENT_ENGINE = 'ruby-sdk'
-  VERSION = '3.8.1'
+  VERSION = '3.9.0'
 end

spec/project_spec.rb

@@ -3625,7 +3625,7 @@ def callback(_args); end
           project_id: '111001',
           revision: '42',
           client_name: 'ruby-sdk',
-          client_version: '3.8.1',
+          client_version: '3.9.0',
           anonymize_ip: false,
           enrich_decisions: true,
           visitors: [{
@@ -3771,7 +3771,7 @@ def callback(_args); end
           project_id: '111001',
           revision: '42',
           client_name: 'ruby-sdk',
-          client_version: '3.8.1',
+          client_version: '3.9.0',
           anonymize_ip: false,
           enrich_decisions: true,
           visitors: [{