Update the list of supported rubies

Author: Nathan Sutton

.travis.yml

@@ -1,12 +1,7 @@
 language: ruby
 rvm:
-  - 2.1
-  - 2.0
-  - 1.9.3
-  - jruby-18mode
-  - jruby-19mode
-  - rbx-2.0.0
-  - rbx-2.1.1
-  - rbx-2.2.5
-  - 1.8.7
-  - ree
+  - 2.5
+  - 2.4
+  - 2.3
+  - 2.2
+  - jruby

README.markdown

@@ -8,14 +8,11 @@ See [https://support.brightcove.com/zencoder](https://support.brightcove.com/zen
 
 Tested on the following versions of Ruby:
 
-* Ruby 1.8.6-p420
-* Ruby 1.8.7-p249
-* Ruby 1.8.7-p352
-* Ruby 1.9.2-p290
-* Ruby 1.9.3-p0
-* Ruby 2.0.0-p353
-* Rubinius 2.0.0dev
-* jRuby 1.6.5
+* Ruby 2.2
+* Ruby 2.3
+* Ruby 2.4
+* Ruby 2.5
+* Latest jRuby
 
 ## 2.5 WARNING!!!