updated changelog for 1.4.0 (#65)

Author: mauerbac

CHANGELOG

@@ -1,8 +1,31 @@
+-------------------------------------------------------------------------------
+## 1.4.0
+October 3, 2017
+
+### New Features
+* Introduce Numeric Metrics - This allows you to include a floating point value that is used to track numeric values in your experiments.
+```
+event_tags = {
+  'category' => 'shoes',
+  'value' => 13.37 # reserved 'value' tag
+}
+optimizely_client.track(event_key, user_id, attributes, event_tags)
+```
+
+* Introduce Forced Variation - This allows you to force users into variations programmatically in real time for QA purposes without requiring datafile downloads from the network. 
+```
+result = optimizely_client.set_forced_variation(experiment_key, user_id, forced_variation_key)
+```
+
+* Upgrade to use new [event API](https://developers.optimizely.com/x/events/api/index.html).
+-------------------------------------------------------------------------------
+
 -------------------------------------------------------------------------------
 2.0.0.beta
 * Introduce feature flags and feature rollouts support.
 * Introduce variable support via feature flags.
 -------------------------------------------------------------------------------
+
 -------------------------------------------------------------------------------
 1.3.0
 * Introduce user profile service support.

optimizely-sdk.gemspec

@@ -4,7 +4,7 @@ require_relative 'lib/optimizely/version'
 Gem::Specification.new do |spec|
   spec.name          = "optimizely-sdk"
   spec.version       = Optimizely::VERSION
-  spec.authors       = ["Andrew Delikat", "Haley Bash", "Optimizely"]
+  spec.authors       = ["Optimizely"]
   spec.email         = ["developers@optimizely.com"]
 
   spec.summary       = "Ruby SDK for Optimizely's testing framework"