1.4.0 2022xxxx
  BF: Review: Optimization/Corrections
  BF: Build: Optimization / correction of the release info process
  CR: Build: Releases are now only available on the release page
  CR: OpenAPI: Added the missing OpenAPI Specification
  NT: Harmonization of version numbers for the different implementations
      Major and minor describe the API, patch refers to the implementation.
      The version of OpenAPI therefore only uses major and minor, patch is always 0.

1.3.0 20210525
  BF: Service: Uniform use of status 204 for 202 / 404
      Status 404 always refers storage and not entities/addressed targets in the storage.
  BF: Service: Uniform use of status 204 for 404 in relation to targets in the storage (axes)
      Status 404 is now only used in relation to storage.
      Addressed targets (axes) use status 204 in combination with the response header Storage-Effects.
  BF: Service: Optimization/harmonization of content types for XML
      Fragments (PUT/PATCH) uses text/xhtml
      XML output uses application/xml
      XSLT input (POST) uses application/xslt+xml
  CR: Service: OPTIONS responds with 204 instead of 200

1.2.0 2021xxxx
  NT: Version was skipped
      For compatibility with the JavaScript implementation

1.1.0 20210225
  BF: Service: Optimization of CONNECT
      Status 507 (Insufficient Storage) now only occurs when a new storage is
      to be created, but not when connecting to an existing one.
  BF: Service: Optimization of CORS
      Correction for a correct preflight OPTIONS response.
      Change to the full notation of the Access-Control headers.
      Omission of the automatic prefix.
  BF: Build: Correction of release
      Release file (zip) was not overwritten if already exists.
  BF: Service: Uniform use of the GMT time zone
      changes: Storage-Last-Modified / Storage-Expiration
  BF: Service: Correction in the creation of trace and trace hashes
  BF: Service: Correction of POST for use of status 422 by errors in the stylesheets instead of status 400
      Concerns the declaration from the output
  CR: Service: Added directives for XPath
      Directives are added at the end of the XPath separated by exclamation marks (!).
  CR: Service: Added the directive JSON
      This directive transforms the output to JSON.
  CR: Service GET/POST: Added support for accept header: application/json
      The header enforces the transformation of XML and text output as JSON.
      If the return value is not application/xslt+xml or text/plain, the header
      has no effect on the output. The client is informed via the Content-Type
      whether the transformation was used.
  CR: Test: Added Snake as proof of concept for a multiplayer game

1.0.0 20201220
  NT: Release is available