v4.0.0

Changelog

• 71c5482 releases 4.0.0
• c0254ad make consumer isolationLevel configurable (fixes #182)
• c23f0e8 fix integration test
• 88aeec3 use a better default for replication-factor when creating a new topic (fixes #180)
• b1b2757 update dependencies
• 25991e5 update go
• b1ae729 Merge pull request #185 from konart/fix_npe
• b279ead Merge pull request #181 from deviceinsight/dependabot/go_modules/golang.org/x/crypto-0.17.0
• ba09560 convert readme to adoc
• df74d9d Merge pull request #186 from deviceinsight/feature/delete-records
• e9e6a73 add delete records command (fixes #183)
• 0ac3c55 Merge pull request #184 from rafiramadhana/177-describe-default-config
• 529b639 use single parameter to control print-configs
• b0d5db0 Fix null pointer exception in sigterm
• 9b32fd8 Add explicit return
• 50f738c Add include defaults
• bcbdd45 Bump golang.org/x/crypto from 0.15.0 to 0.17.0