Add 0.13.0 article

Add 0.13.0 article

Signed-off-by: azerr <[email protected]>

README.md

@@ -86,6 +86,7 @@ Since 0.13.0:
 
 ## Articles
 
+ * [Improved XML grammar binding and more in Red Hat VS Code XML extension 0.13.0](https://developers.redhat.com/blog/2020/07/08/improved-xml-grammar-binding-and-more-in-red-hat-vs-code-xml-extension-0-13-0/)
  * [Improved schema binding and more in Red Hat XML extension for VS Code 0.12.0 and LemMinX](https://developers.redhat.com/blog/2020/07/02/improved-schema-binding-and-more-in-red-hat-xml-extension-for-vs-code-0-12-0-and-lemminx/)
  * [Eclipse LemMinX version 0.11.1](https://developers.redhat.com/blog/2020/03/27/red-hat-xml-language-server-becomes-lemminx-bringing-new-release-and-updated-vs-code-xml-extension/)
  * [What's new in the Visual Studio Code XML Extension 0.8.0](https://developers.redhat.com/blog/2019/07/24/whats-new-in-the-visual-studio-code-xml-extension/)