Upgrade ruby to 2.1.5

Robert Mitwicki · Robert Mitwicki · commit 242371836f8b · 2015-01-18T16:35:35.000+01:00
diff --git a/.ruby-version b/.ruby-version
@@ -1 +1 @@
-2.0.0
+2.1.5
diff --git a/.travis.yml b/.travis.yml
@@ -3,4 +3,5 @@ bundler_args: --without development
 rvm:
   - rbx-19mode
   - jruby-19mode
-  - 1.9.3
+  - 2.1.5
+env: JRUBY_OPTS=--2.0
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@ The core logic for handling CAS requests independent of any particular storage o
 
 ## Requirements
 
-* ruby 1.9.x
+* ruby 2.1.x
 
 ## Contributing
 
