Update changes, version

Changes.md

@@ -1,3 +1,20 @@
+2.15.0
+-----------
+
+- The Core Sidekiq actors are now monitored.  If any crash, the
+  Sidekiq process will exit immediately.  This is to help prevent
+  "stuck" Sidekiq processes which are running but don't appear to
+  be doing any work. [#1194]
+- Sidekiq's testing framework is now dynamic.  You can choose between
+  `inline` and `fake` behavior in your tests. [#1193]
+- The Retries table has a new column for the error message.
+- Sidekiq.default\_worker\_options allows you to configure default
+  options for all Sidekiq worker types.
+
+```ruby
+Sidekiq.default_worker_options = { 'queue' => 'default', 'backtrace' => true }
+```
+
 2.14.1
 -----------
 

lib/sidekiq/version.rb

@@ -1,3 +1,3 @@
 module Sidekiq
-  VERSION = "2.14.1"
+  VERSION = "2.15.0"
 end