Pull request: all: upd go, tools, deps

Updates #2275.
Updates #3057.

Squashed commit of the following:

commit da22ad203cec1ef2a5d0a218933ddc3ac03c2ad3
Merge: dbd7e202 779fbe79
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Dec 22 16:26:46 2021 +0300

    Merge branch 'master' into 2275-upd-go

commit dbd7e20209ddc04198e89698b7e3c2750c4d9902
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Dec 22 15:04:17 2021 +0300

    all: upd docker img

commit 269796e3a00f60120a6327d6501f2dde031435c4
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Tue Dec 21 21:04:25 2021 +0300

    all: upd go, tools, deps

internal/dhcpd/server.go

@@ -27,7 +27,6 @@ type DHCPServer interface {
 	Start() (err error)
 	// Stop - stop server
 	Stop() (err error)
-
 	getLeasesRef() []*Lease
 }