Bump version and update changelog

Author: fizruk

Diff for: CHANGELOG.md

@@ -1,3 +1,10 @@
+2.1.6
+-----
+
+* Add `ToParamSchema` and `ToSchema` instances for `Fixed` (see [#121](https://github.com/GetShopTV/swagger2/pull/121)) and `Natural` (see [#123](https://github.com/GetShopTV/swagger2/pull/123));
+* Fix instance for `NominalDiffTime` (see [#121](https://github.com/GetShopTV/swagger2/pull/121));
+* Fix build for `aeson-1.2.2.0` (see [#125](https://github.com/GetShopTV/swagger2/pull/125)).
+
 2.1.5
 -----
 

Diff for: swagger2.cabal

@@ -1,5 +1,5 @@
 name:                swagger2
-version:             2.1.5
+version:             2.1.6
 synopsis:            Swagger 2.0 data model
 description:
   This library is inteded to be used for decoding and encoding Swagger 2.0 API