NEW in 3.3.0.beta - 2022-02-14
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  * Add API to serialize data into various RDF formats
  * Add API to map a TrackerSparqlConnection as a SERVICE
    of another TrackerSparqlConnection
  * Fixed possible warnings and missed notifications in
    TrackerNotifier
  * Updated "tracker3 export" to use serialization API
  * Documentation fixes
  * Added internal TrackerRowid type to represent ROWIDs