uname_os_check 'MSYS_NT-10.0' got converted to 'msys_nt-10.0' which is not a GOOS value

[AlekSi]

It is the same issue as #3 which is not really fixed. 519ed57 added msys_nt, but not msys_nt-10.0.

[AlekSi]

It also fails on AppVeyor: https://ci.appveyor.com/project/AlekSi/reform/builds/21094857/job/esq6cyx4tgwfiisb

$ curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b c:\gopath/bin v1.12.3

golangci/golangci-lint crit uname_os_check 'MSYS_NT-6.3' got converted to 'msys_nt-6.3' which is not a GOOS value. Please file bug at https://github.com/client9/shlib