Fixed issue with guzzle 7

Added missing fields in User

Merge pull request NicklasWallgren#45 from chhaihongsrun/add-support-…

…for-guzzlehttp-v7

Added support for multiple GuzzleHttp v6 and v7

Preparations for next release

Added support for add/deletion of comment

Updated User DTO - Fixed issue with invalid data type. Fixes NicklasW…

…allgren#7 NicklasWallgren#8

Feed: Search and retrieve feed by user NicklasWallgren#5

Added support for hashtag search and feed

Added a new authentication option - Login using nonce

Added logout method