Creates 2.0.6 changelog

Creates a stub for the 2.0.6 changelog, and moves the #545 entry to the
2.0.6 release, where it belongs.

Also sets a date for the 2.0.6 release.

Author: weierophinney

CHANGELOG.md

@@ -2,6 +2,33 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
+## 2.0.6 - 2017-12-11
+
+### Added
+
+- Nothing.
+
+### Changed
+
+- Nothing.
+
+### Deprecated
+
+- Nothing.
+
+### Removed
+
+- Nothing.
+
+### Fixed
+
+- [#534](https://github.com/zendframework/zend-expressive/pull/534) provides a
+  fix for how it detects `callable` middleware. Previously, it relied on PHP's
+  `is_callable()`, but that function can result in false positives when provided
+  a 2-element array where the first element is an object, as the function does
+  not verify that the second argument is a valid method of the first. We now
+  implement additional verifications to prevent such false positives.
+
 ## 2.0.5 - 2017-10-09
 
 ### Added
@@ -30,13 +57,6 @@ All notable changes to this project will be documented in this file, in reverse
   requires it. This addition fixes problems due to missing http-middleware
   interfaces.
 
-- [#534](https://github.com/zendframework/zend-expressive/pull/534) provides a
-  fix for how it detects `callable` middleware. Previously, it relied on PHP's
-  `is_callable()`, but that function can result in false positives when provided
-  a 2-element array where the first element is an object, as the function does
-  not verify that the second argument is a valid method of the first. We now
-  implement additional verifications to prevent such false positives.
-
 ## 2.0.4 - 2017-10-09
 
 ### Added