Modernize Ruby suite

* Drop support for Ruby < 2.2
* Drop support for Rubinius
* Update to JRuby 9000

.travis.yml

@@ -1,14 +1,15 @@
 language: ruby
 rvm:
-  - 1.9.3
-  - 2.0.0
-  - 2.1.0
-  - jruby
-  - rbx-2.1.1
+  - 2.2.0
+  - jruby-9.0.1.0
+  - jruby-head
   - ruby-head
 matrix:
   allow_failures:
-    - rvm: rbx-2.1.1
+    - rvm: jruby-head
     - rvm: ruby-head
 notifications:
-  irc: "irc.freenode.org#adhearsion"
+  irc: "irc.freenode.org#adhearsion"
+  slack:
+    secure: Y7EqF/9FY7mca63c1DM7kEr34fNtFclWXJj9vLqVQJwR3rCDZUZSD8DlqHJDwE6KRCCDsSkyV4lihCim+GEM28CRcJir0AEUJhXHvIMckjH7n38W9OGN26RuJGZTapjgCSMOBeq0YpSe6dAnZeRpZRJxsTFtP5ptLD5RRjIMzZM=
+sudo: false

CHANGELOG.md

@@ -1,4 +1,5 @@
 # develop
+  * CHANGE: Drop support for Ruby < 2.2, which is required by Adhearsion 3
   * BUG - Listening to new messages needs to set the `new_or_saved` metadata. Otherwise, after visiting saved messages, the status is always `:saved`
   * FEATURE - Refactor voicemail storage (backward incompatible change)
     * Pass storage instance in metadata to all controllers