prepare for release v3.1.2 (#428)

.travis.yml

@@ -77,7 +77,7 @@ jobs:
       os: osx
       osx_image: xcode10
       env:
-        - VERSION=3.1.1
+        - VERSION=3.1.2
       install:
         # install hub
         - wget https://github.com/github/hub/releases/download/v2.11.2/hub-darwin-amd64-2.11.2.tgz -O /tmp/hub-darwin-amd64-2.11.2.tgz && tar -xvf /tmp/hub-darwin-amd64-2.11.2.tgz -C /usr/local/opt && ln -s /usr/local/opt/hub-darwin-amd64-2.11.2/bin/hub /usr/local/bin/hub
@@ -90,7 +90,7 @@ jobs:
       os: osx
       osx_image: xcode10
       env:
-        - VERSION=3.1.1
+        - VERSION=3.1.2
       install:
         # install hub
         - wget https://github.com/github/hub/releases/download/v2.11.2/hub-darwin-amd64-2.11.2.tgz -O /tmp/hub-darwin-amd64-2.11.2.tgz && tar -xvf /tmp/hub-darwin-amd64-2.11.2.tgz -C /usr/local/opt && ln -s /usr/local/opt/hub-darwin-amd64-2.11.2/bin/hub /usr/local/bin/hub

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Optimizely Objective-C SDK Changelog
 
+## 3.1.2
+July 15th, 2019
+
+This includes a fix of a minor bug that OPTLYClient may be initialized redundantly. It also embeds copies of Optimizely X.509 certificates for optional TLS certificate pinning support.
+
+### New Features
+* Copies of root X.509 certificates are included in OptimizelySDKCore framework bundle (for optional TLS certificate pinning).
+
+### Bug Fixes:
+* OPTLYClient initialization is changed from `[[OPTLYClient new] initWithBuilder:]` to `[[OPTLYClient alloc] initWithBuilder:]` to avoid redundant initialization.
+
 ## 3.1.1
 May 21st, 2019