Madon 3.0.0

Changes since 2.4.0:

• Fix unmarshalling JSON into a truncated slice
  This could cause bogus data when several pages are fetched.
• Add support for more kinds of streams and events
• Fix support non-integer IDs (used e.g. by Pleroma instances)
• Fix OAuth and form parameters with Pleroma

Changes since 2.3.0:

• Support search v2 API
• Add suggestion (GetSuggestions and DeleteSuggestion) and endorsement (GetEndorsements, {Pin,Unpin}Account)
• Add UploadMediaReader
• Misc. type adjustments
• Fix handling of arrays in API calls
• Fix header & avatar uploads
• Improve parsing of server errors
• Switch to Go modules