Markdown 3.4 causes TypeError due to breaking changes #36
Description
Markdown 3.4 has just been released and it brings breaking changes to v0.0.15
...lib/python3.7/site-packages/sphinx_markdown_tables/__init__.py", line 24, in process_tables
table_processor = markdown.extensions.tables.TableProcessor(md.parser)
TypeError: __init__() missing 1 required positional argument: 'config'
See Python-Markdown 3.4 Release Notes
Fix required here: https://github.com/ryanfox/sphinx-markdown-tables/blob/master/sphinx_markdown_tables/__init__.py#L24