docs: update CHANGELOG

Author: svolkov

CHANGELOG.md

@@ -1,8 +1,9 @@
-# next release  
+# 1.3.0  
 Features:  
   - Api module description from schema info  
     ![api description](./assets/changelog_assets/api-module-description.jpg)  
   - Generate API types declarations (CLI flag `--route-types`)  
+    ![route types](./assets/changelog_assets/route-types.jpg)  
   - Ability to not generate clint API class (CLI flag `--no-client`)  
 Internal:  
   - refactored `generate` and `validate` test scripts