Ignore dot import aliases in git push in import-alias-naming rule

[denisvmedia]

Is your feature request related to a problem? Please describe.
Dot import aliases (import . "pkg/some") is a special feature in go. import-alias-naming rule was not meant to deal with special import aliases (thus it ignores _). Unfortunately, . import alias sneaked away from my focus.

Describe the solution you'd like
Ignore . alias in the code.

Describe alternatives you've considered
In golangci-lint it is possible to ignore this issue specifically, but it should be a part of revive as an easy and clean solution.

Additional context
I will provide a PR.

[denisvmedia]

cc @chavacava

[denisvmedia]

cc @mgechev