Pull request: 2639 use testify require vol.1

Merge in DNS/adguard-home from 2639-testify-require-1 to master

Updates #2639.

Squashed commit of the following:

commit da7d283
Merge: c4af71b 63e4adc
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Tue Feb 9 14:27:41 2021 +0300

    Merge branch 'master' into 2639-testify-require-1

commit c4af71b
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Feb 8 19:32:51 2021 +0300

    querylog: fix tests for windows

commit b616ea5
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Feb 8 18:29:28 2021 +0300

    querylog: imp tests again

commit 091a698
Author: Eugene Burkov <e.burkov@adguard.com>
Date:   Mon Feb 8 15:49:38 2021 +0300

    querylog: imp tests