Merge pull request TheThingsNetwork#2710 from rvolosatovs/release/3.8.4

Release 3.8.4

Release version 3.8.3

Release version 3.8.2

Release version 3.8.1

Merge pull request TheThingsNetwork#2488 from rvolosatovs/release/3.8.0

Release version 3.7.2

Release version 3.7.1

Release version 3.7.0

Release version 3.6.3

Release candidate 2 for version 3.7.0