Remove build artifacts from repository and update .gitignore

- Remove .whl files (icalendar, python-dateutil, six, tzdata)
- Remove dist/*.tar.gz build artifacts
- Add *.whl to .gitignore to prevent future commits of wheel files

These files should not have been committed to the repository as they
are build artifacts that can be regenerated.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: tobixen

.gitignore

@@ -25,6 +25,7 @@ share/python-wheels/
 *.egg-info/
 .installed.cfg
 *.egg
+*.whl
 MANIFEST
 
 # PyInstaller

CHANGELOG.md

@@ -5,7 +5,13 @@ 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).
 
-## [Unreleased]
+## [0.3.1] - 2025-11-26
+
+Some wheel files etc that shouldn't be in the repository has accidentally been added.  Either I've done some silly mistake while sleeping, or perhaps it was a mistake giving the AI access to my computer.
+
+## [0.3.0] - 2025-11-26
+
+Categories are a mess.  I've tried to make a predictable behaviour by making a distinction between `categories` (handling the property filter value as a list that should match or be a subset of the event category set)  and `category` (handling the property filter value as a string that should match towards at least one of the categories in the event).
 
 ### Added
 - **"category" (singular) property filter**: New virtual property for substring matching within category names