chore: prepare for release 3.3.1 (#197)

Author: jaeopt

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 3.3.1
+May 28th, 2020
+
+### Bug Fixes:
+- This release adds an SDK key param to Optimizely constructor. The user can now create an Optimizely instance only using an SDK key. Previously the user was required to create a HTTPProjectConfigManager, and pass it as a config manager in the constructor. ([#189](https://github.com/optimizely/php-sdk/pull/189), [#193](https://github.com/optimizely/php-sdk/pull/193)) 
+
 ## 3.3.0
 January 27th, 2020
 

src/Optimizely/Event/Builder/EventBuilder.php

@@ -38,7 +38,7 @@ class EventBuilder
     /**
      * @const string Version of the Optimizely PHP SDK.
      */
-    const SDK_VERSION = '3.3.0';
+    const SDK_VERSION = '3.3.1';
 
     /**
      * @var string URL to send event to.

tests/EventTests/EventBuilderTest.php

@@ -68,7 +68,7 @@ public function setUp()
                 ]],
                 'revision' => '15',
                 'client_name' => 'php-sdk',
-                'client_version' => '3.3.0',
+                'client_version' => '3.3.1',
                 'anonymize_ip'=> false,
                 'enrich_decisions' => true,
             ];