PyPi release v0.8.0

• Updates recommended RKorAPClient version to 0.8.0
• Added textMetadata KorAPConnection method to retrieve all metadata for a text based on its sigle
• Added webUiRequestUrl column also to corpusStats results, so that also virtual corpus definitions can be linked to / tested directly in the KorAP UI
• Uses server side tokenized matches in collocation analysis, if supported by KorAP server
• Unless metadataOnly is set, also tokenized snippets are now retrieved in corpus queries
  (stored in res.slots['collectedMatches']['tokens.left'], res.slots['collectedMatches']['tokens.match'],
  res.slots['collectedMatches']['tokens.right']). Because Pandas data frames cannot store lists, tokens are stored as strings, tab separated.
• Python 3.11 and 3.12 are now supported
• Python 3.7 support has been dropped (by rpy2 dependency)