(fix) Updated version number and CHANGELOG file

Author: aarmoa

CHANGELOG.md

@@ -15,6 +15,10 @@ All notable changes to this project will be documented in this file.
 - Updated all proto definitions based on chain upgrade to v1.13
 - Refactored cookies management logic to use all gRPC calls' responses to update the current cookies
 
+## [1.5.4] - 2024-07-03
+### Changed
+- Fixed all import statements in pyinjective.proto modules to make them explicit
+
 ## [1.5.3] - 2024-06-12
 ### Changed
 - Changed parameter `key` from the PaginationOption class.