0.0.7

- [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