Scm Backup Versions Save

One new feature:

• new config option: output a second log message when a repo's backup is finished

...and some "internal" improvements:

• new versions of dependencies
• the download now includes the license
• additional CI build for Linux

One new feature:

• New configuration setting includeRepos: lets you specify a list of repos, only these repos will be backed up, all others will be ignored
  ⇒ Documentation

Changes:

• SCM Backup can detect (and optional delete) repos that were deleted from the hoster, but still are in the local backup dir
  ⇒ Documentation
• Backing up repos whose name ends with . is now possible

Changes:

• Logging improved under the hood.
  Loggers can now:
  • backup their configuration files
  • execute code when SCM Backup exits (which simplifies the code for the Emailing output feature)

Changes:

• Fix Bitbucket errors caused by Mercurial repos
  (2 months after Bitbucket's Mercurial deprecation, their API still returns Mercurial repos but cloning/pulling them fails -> ignore them)
• Show operating system on startup

One bugfix:

• Detecting if Mercurial is installed and determining the version number now works on non-English systems as well

Changes:

• Backing up Bitbucket workspaces is now fully supported ⇒ Documentation
  Note: Bitbucket will make breaking API changes on October 14, which unfortunately means that backing up from Bitbucket with all SCM Backup versions < 1.5 won't work anymore!

• Process exit code is set to 0 on success and 1 on failure (thanks to nzbart for contributing this)

• The subject of the generated email now contains "Success" or "Failure"

There is only one change:

• Backing up repositories owned by a user from Bitbucket is working again (repositories owned by teams were not affected).
  → More details

• Passwords can now be taken from environment variables instead of saving in clear text in the config file
  (docs / issue)

• New: GitLab support
• Updated to .NET Core 3.1
• Updated all dependencies