golangci-lint/CI: Bump versions and introduce new linters (#798)

* golangci-lint/CI: Bump versions

Fix remaining linter issues

* Specifically set AppVeyor version

* Fix the infamous typos 👀

* Add go env cmd to AppVeyor

* Add go version cmd to AppVeyor

* Specify AppVeyor image, adjust linters

* Update go get to go install due to deprecation

* Bump golangci-lint timeout time for AppVeyor

* Change NW contract to NQ

* Address nitters

* GetRandomPair -> Pair{}

* Address nits

* Address time nitterinos plus additional tweaks

* More time inception upgrades!

* Bending time and space

engine/rpcserver_test.go

@@ -1557,8 +1557,7 @@ func TestGetActiveDataHistoryJobs(t *testing.T) {
 		Interval:  kline.OneMin,
 	}
 
-	err := m.UpsertJob(dhj, false)
-	if !errors.Is(err, nil) {
+	if err := m.UpsertJob(dhj, false); !errors.Is(err, nil) {
 		t.Fatalf("received %v, expected %v", err, nil)
 	}