0.0.7

[ardumont]

• [X] Add prefix argument to `markdown-toc/generate-toc' to replace existing TOC at the same location #10
• [X] Simplify tests launcher
• [X] Add itest on toc generation when using modifier [2/2]
  • [X] Use ert to simplify tests output reading in case of error
  • [X] Add test on the new use case from #10
• [X] Update README.md
• [X] Update version
• [X] Release notes