git-semver fails if launched from a subfoler of the repository

[yobeonline]

Description

Git-semver fails when launched from a subdirectory, wherease git describe succeeds.

Steps to reproduce

mkdir -p test/foo
cd test
git init
touch foo/bar
git add foo/bar
git commit -m"init"
git tag -a 0.1.0 -m"release"
cd foo
git describe
# 0.1.0
git-semver
# failed to open repo: repository does not exist

Fix

I will PR later, but I think the problem lies here. According to this post, you should call git.PlainOpenWithOptions instead of git.PlainOpen. The option structure is declared here and should have the attribute DetectDotGit set to true.