Update CHANGELOG for v1.5.3

***NO_CI***

Author: nfbot

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## [v1.5.3-preview.19.ga29c9d0cfe](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/tree/v1.5.3-preview.19.ga29c9d0cfe) (2021-03-21)
+
+[Full Changelog](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/compare/v1.5.3-preview.18...v1.5.3-preview.19.ga29c9d0cfe)
+
 ## [v1.5.3-preview.18](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/tree/v1.5.3-preview.18) (2021-03-02)
 
 [Full Changelog](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/compare/v1.5.3-preview.17...v1.5.3-preview.18)
@@ -372,7 +376,6 @@
 **Documentation and other chores:**
 
 - Bumps nanoFramework.CoreLibrary from 1.0.6-preview-021 to 1.1.0 [\#27](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/pull/27)
-- Bumps nanoFramework.CoreLibrary from 1.0.6-preview-010 to 1.0.6-preview-021 [\#26](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/pull/26)
 
 ## [v1.0.2-preview-049](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/tree/v1.0.2-preview-049) (2018-11-27)
 
@@ -432,6 +435,7 @@
 
 **Documentation and other chores:**
 
+- Bumps nanoFramework.CoreLibrary from 1.0.6-preview-010 to 1.0.6-preview-021 [\#26](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/pull/26)
 - Bumps nanoFramework.CoreLibrary from 1.0.4 to 1.0.5-preview024 [\#16](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/pull/16)
 
 ## [v1.0.2-preview-036](https://github.com/nanoframework/lib-nanoFramework.Networking.Sntp/tree/v1.0.2-preview-036) (2018-10-17)