Upgrade axe-core JS version

[pamelafox]

This pull request updates the project to version 0.1.5, introduces a new changelog file, upgrades the axe-core JS library, and adjusts the test cases to reflect the changes in accessibility rule evaluations. Below are the key changes grouped by theme:

Version and Documentation Updates:

• Added a new CHANGELOG.md file to document notable changes, starting with version 0.1.5, which includes an upgrade to axe-core JS v4.10.3. This upgrade may result in changes to the number of reported violations due to new and updated rules.
• Updated the project version in pyproject.toml from 0.1.4 to 0.1.5.

Test Adjustments for Updated axe-core Rules:

• Updated test assertions in tests/test_axe_async_playwright.py and tests/test_axe_sync_playwright.py to reflect changes in the number of inapplicable, passes, and violations due to the axe-core upgrade:
  • inapplicable count changed from 71 to 75.
  • passes count changed from 7 to 6. [1] [2] [3]