Update .travis.yml

This PR includes these update

* Update Ruby 2.2.2 -> 2.2.4
* Add Ruby 2.3
* Fix exclude test matrix (we should exclude 1.9.3 not 1.9.2)
* Add exclude test matrix (Ruby 2.2 or 2.3 x Rails3)

.travis.yml

@@ -2,7 +2,8 @@ sudo: false
 
 rvm:
   - 1.9.3
-  - 2.2.2
+  - 2.2.4
+  - 2.3.0
 
 gemfile:
   - gemfiles/sqlite3_ar_30.gemfile
@@ -26,12 +27,48 @@ gemfile:
 
 matrix:
   exclude:
-    - rvm: 1.9.2
+    - rvm: 1.9.3
       gemfile: gemfiles/sqlite3_ar_40.gemfile
-    - rvm: 1.9.2
+    - rvm: 1.9.3
       gemfile: gemfiles/mysql_ar_40.gemfile
-    - rvm: 1.9.2
+    - rvm: 1.9.3
       gemfile: gemfiles/pg_ar_40.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/sqlite3_ar_30.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/mysql_ar_30.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/pg_ar_30.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/sqlite3_ar_30.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/mysql_ar_30.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/pg_ar_30.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/sqlite3_ar_31.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/mysql_ar_31.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/pg_ar_31.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/sqlite3_ar_31.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/mysql_ar_31.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/pg_ar_31.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/sqlite3_ar_32.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/mysql_ar_32.gemfile
+    - rvm: 2.2.4
+      gemfile: gemfiles/pg_ar_32.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/sqlite3_ar_32.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/mysql_ar_32.gemfile
+    - rvm: 2.3.0
+      gemfile: gemfiles/pg_ar_32.gemfile
 
 services:
   - mysql