Can't use item list

[daixtrose]

Consider this markdown:

## GUID

2db62bb2-8ac0-4137-b26f-78a12bff449d

## Title

Some title

## Summary

A Summary
## Priority

- Must

## Detailed Description

- Lorem Ipsum Blabla
- Lorem Ipsum Blabla 

## Reference Requirements

> na

## Categories

- Cat6

The command md_to_json Test.md yields

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\Scripts\md_to_json-script.py", line 11, in <module>
    load_entry_point('markdown-to-json==1.0.0', 'console_scripts', 'md_to_json')()
  File "C:\ProgramData\Anaconda3\lib\site-packages\markdown_to_json-1.0.0-py3.6.egg\markdown_to_json\scripts\md_to_json.py", line 94, in main
  File "C:\ProgramData\Anaconda3\lib\site-packages\markdown_to_json-1.0.0-py3.6.egg\markdown_to_json\scripts\md_to_json.py", line 72, in jsonify_markdown
  File "C:\ProgramData\Anaconda3\lib\site-packages\markdown_to_json-1.0.0-py3.6.egg\markdown_to_json\markdown_to_json.py", line 59, in nest
  File "C:\ProgramData\Anaconda3\lib\site-packages\markdown_to_json-1.0.0-py3.6.egg\markdown_to_json\markdown_to_json.py", line 66, in _dictify_blocks
  File "C:\ProgramData\Anaconda3\lib\site-packages\markdown_to_json-1.0.0-py3.6.egg\markdown_to_json\markdown_to_json.py", line 80, in _ensure_list_singleton
markdown_to_json.markdown_to_json.ContentError: Error at line 14: Can't mix lists and other content

[njvack]

What if you add a blank line between "A Summary" and "## Priority"?