Update changelog

Signed-off-by: Rahul Krishna <i.m.ralk@gmail.com>

Author: rahlk

CHANGELOG.md

@@ -5,6 +5,64 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.5] - 2025-07-11
+
+### Fixed
+- Fixed `TypeError` when calling `BaseModel.model_dump_json()` with unsupported `separators` argument (Issue #8)
+- Fixed ANSI color codes appearing in CLI test output despite `color=False` setting in CI/CD environments (Issue #9)
+- Replaced deprecated `astor.to_source()` with built-in `ast.unparse()` for better Python 3.12+ compatibility
+
+### Changed
+- Updated JSON output formatting to use `indent=None` for compact output instead of unsupported `separators` parameter
+- Enhanced CLI test configuration to explicitly disable colors using environment variables (`NO_COLOR=1`, `TERM=dumb`)
+- Improved test robustness for CI/CD environments, particularly GitHub Actions
+- Updated test assertions to properly validate JSON output structure and content
+
+### Removed
+- Removed `astor` dependency in favor of Python's built-in `ast.unparse()` functionality
+
+### Added
+- Comprehensive coverage configuration in `pyproject.toml` with proper source mapping and exclusions
+- Enhanced test fixtures with improved project root path calculation
+- Proper logging configuration for test environments
+- Coverage reporting with HTML output and configurable thresholds
+
+## [0.1.4] - 2025-07-11
+
+### Added
+- MessagePack output format support for ultra-compressed analysis results (achieving 80-90% size reduction)
+- `--format` flag allowing users to choose between JSON and MessagePack output formats
+- Built-in decompression logic for MessagePack files
+- Enhanced output file handling with format-specific extensions
+
+### Changed
+- Improved output file compression and serialization performance
+- Enhanced schema handling for better serialization efficiency
+- Updated CLI to support multiple output formats
+
+### Fixed
+- Performance issues with large analysis result files through compression
+
+## [0.1.3] - 2025-07-10
+
+### Fixed
+- Fixed broken logo display on PyPI package page (Issue #4)
+- Updated README.md to use absolute URLs instead of relative paths for images
+
+### Changed
+- Updated package metadata for better PyPI presentation
+
+## [0.1.2] - 2025-07-10
+
+### Fixed
+- Fixed CLI installation and execution issues (Issue #2)
+- Resolved package import problems in installed package
+
+### Changed
+- Reorganized project structure from `src/codeanalyzer` to `codeanalyzer` for better packaging
+- Updated build configuration in `pyproject.toml` to properly include all package files
+- Moved test directory from `src/test` to `test` for cleaner project structure
+
 ## [0.1.1] - 2025-07-10
 
 ### Added