Add Ruby 2.3 to the Travis CI matrix and test from newest to oldest release

Author: sodabrew

.travis.yml

@@ -10,11 +10,12 @@ addons:
   hosts:
     - mysql2gem.example.com
 rvm:
-  - 1.8.7
-  - 1.9.3
-  - 2.0.0
-  - 2.1
+  - 2.3.0
   - 2.2
+  - 2.1
+  - 2.0.0
+  - 1.9.3
+  - 1.8.7
   - ree
   - rbx-2
   - ruby-head

appveyor.yml

@@ -25,12 +25,12 @@ test_script:
 #  - find tmp -name "*.log" -exec cat {};
 environment:
   matrix:
-    - ruby_version: "200"
-    - ruby_version: "200-x64"
-    - ruby_version: "21"
-    - ruby_version: "21-x64"
-    - ruby_version: "22"
     - ruby_version: "22-x64"
+    - ruby_version: "22"
+    - ruby_version: "21-x64"
+    - ruby_version: "21"
+    - ruby_version: "200-x64"
+    - ruby_version: "200"
 cache:
   - vendor
 services: