Update CHANGELOG for v1.0.0-preview013

Author: nfbot

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Change Log
 
+## [**Changes available only in 'Preview' NuGet packages:**](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/tree/HEAD)
+
+**Documentation and other chores:**
+
+- Work on CD/CI [\#1](https://github.com/nanoframework/lib-nanoFramework.System.Net.Http/pull/1)
+
 
 
 \* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*