Update CHANGELOG for v1.0.4

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,11 +1,11 @@
 # Change Log
 
-## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/tree/HEAD)
-
-[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/compare/v1.0.4-preview-003...HEAD)
+## [v1.0.4](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/tree/v1.0.4) (2019-01-22)
+[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/compare/v1.0.4-preview-003...v1.0.4)
 
 **Documentation and other chores:**
 
+- Release v1.0.4 [\#13](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/pull/13)
 - Update 3 NuGet dependencies [\#12](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/pull/12)
 
 ## [v1.0.4-preview-003](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/tree/v1.0.4-preview-003) (2019-01-03)