Updated changelog for release

Author: jhalterman

CHANGELOG.md

@@ -1,9 +1,10 @@
-# (next release)
+# 2.4.2
 
 ### Improvements
 
 - Added `RetryPolicy.onRetryScheduled` event handler.
 - Added `ExecutionEvent.getExecutionCount()` and `ExecutionContext.getExecutionCount()`, which distinguishes between attempts which may have been rejected and completed executions.
+- Added `Failsafe.none` to create a no-op `FailsafeExecutor`.
 - Improved support for outer Timeouts with retries.
 - Fixed #221 - Added support for `FailsafeExecutor.with(Executor)`.
 - Fixed #277 - Changed `Timeout` to use Failsafe's internal scheduler, so that user provided `ExecutorService` shutdowns do not interfere with timeouts.