Instead of enabling all linters, and when disabling some of them because
we don't like them, switch to list of explicitly enabled linters. The
upside of this is we can easily upgrade golangci-lint (i.e. any new
linters won't break our CI). The downside is, we need to explicitly
enable extra linters.
To me, this is better from the maintainability perspective.
NOTE this commit does not change the configuration in any way, in other
words, the list of linters being run is the same as before. The next
commit will address this.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
