v2.0.0

Fixed

• Fixed README.md
• Fixed doxygen docu regarding brief description not rendering correctly in Visual Studio (#25)

Changed

• Updated thirdparty components (#26)
• Upgraded cmake version to 3.22 (#27)
• Upgraded github CI os and compiler (#27)
• Upgraded github CI actions (#28)
• Except for the TModelInfo all other TModel constructor parameters have to be forcibly moved now
• The rexsapi tools currently do not support the resolving of external component references and should be
  used with --mode-relaxed if references lead to problems
• TModelLoader now takes an optional TDataSourceResolver to resolve external component references (#31)
• Analogous to the TModelLoader, TJsonModelLoader and TXMLModelLoader also take an optional TDataSourceResolver

Added

• External ids will be used for better error messages for easier finding a specific erroneous component in a
  model file (#2)
• Components can have an external id, which represents exactly the components id specified in a model file (#4)
• Added model database file for 1.6 models (#30)
• References into external data sources can now be used for REXS models >= version 1.5 (#31)
• External sub components checker (#31)
• New check method for main components to TRelationTypeChecker (#36)
• TModelMerger to merge multiple TModel instances into a new instance (#36)
• The TModelBuilder can now use user supplied integers as ids