Agniva De Sarker 98e7bb9ee9 Bump golangci to use 1.18 (#20010) ...

https://mattermost.atlassian.net/browse/MM-42148

```release-note
NONE
```

2022-04-18 13:53:07 +05:30

..

commands

MM-42880: Fix TestRunServerSuccess (#19910)

2022-04-07 20:13:27 +05:30

main_test.go

Bump golangci to use 1.18 (#20010)

2022-04-18 13:53:07 +05:30

main.go

MM-36271: Bump major version to 6.0 (#17973)

2021-07-22 12:21:47 +05:30