py-mkdocs: updated to 1.0.3

Version 1.0.3:
Bugfix: Warn on relative paths in navigation
Bugfix: Handle empty theme_config.yml files correctly

Version 1.0.2:
Bugfix: Provide absolute base_url to error templates

Version 1.0.1:
Bugfix: Prevent page reload when [Enter] is pressed in search box
Bugfix: Avoid calling search until all assets are ready
Bugfix: Exclude README.md if index.md is present
Bugfix: Fix readthedocs theme navigation bug with homepage

Version 1.0:
Keyboard shortcuts changed to not conflict with commonly used accessibility shortcuts
User friendly YAML parse errors
Officially support Python 3.7.
A missing theme configuration file now raises an error.
Empty extra_css and extra_javascript settings no longer raise a warning.
Add highlight.js configuration settings to built-in themes
Close search modal when result is selected
Add a level attribute to AnchorLinks
Add MkDocs version check to gh-deploy script
Improve Markdown extension error messages.
Drop official support for Python 3.3 and set tornado>=5.0
Add support for GitLab edit links
Link to GitHub issues from release notes
Expand {sha} and {version} in gh-deploy commit message
Compress sitemap.xml
Defer loading JS scripts
Add a title attribute to the search input
Update RespondJS to latest version
Always load Google Analytics over HTTPS
Improve scrolling frame rate
Provide more version info.
Refactor writing-your-docs.md
Workaround Safari bug when zooming to < 100%
Remove addition of clicky class to body and animations.
Prevent search plugin from reinjecting extra_javascript files
Refactor copy_media_files util function for more flexibility
Remove PyPI Deployment Docs
Update links to Python-Markdown library
Document how to generate manpages for MkDocs commands

(adam)