v0.0.7

• Improves the Gantt extension:
• • now supports multiple periods in the same row
• • now supports activities using the start date from the previous activity (automatic dates)
• Adds a contributors plugin (neoteroi.contribs) to display contributors'
  information in each page, obtaining information from the Git repository at
  build time
• Increases the version of pinned dependencies (httpx and mkdocs)

Thanks to @chrfla-cognite for his first contribution!