Feature Request: Consider go.mod while finding file like the vgo do

[tonyseek]

Since vgo was introduced, Go projects could create a go.mod file to allow the module be compiled and tested outside GOPATH. But gocover-cobertura finds files from GOPATH while generating the coverage details.

Would gocover-cobertura add support to the go.mod protocol like vgo? When a go.mod is found, the module github.com/foo/bar will be extracted, and the working directory will be used for generating coverage report instead of $GOPATH/src/github.com/foo/bar.

[xhd731568849]

you are really good at English!!

[vigamage]

Is this the reason for me to get github.com/t-yuki/gocover-cobertura@v0.0.0-20180217150009-aaee18c8195c: is explicitly required in go.mod, but not marked as explicit in vendor/modules.txt

I am on go version 1.16 and I don't use vendor anymore. However, this dependency looks to be using vendor directory still.