Add option to ignore the currently checked out branch

[phwt]

• The --ignore-branch flag will forced the URL to be /TRACKED_REMOTE_USER/CURRENT_REPO/ without the /tree/CURRENT_BRANCH suffix that appears when default branch is not checked out.
• Add main as an alternative default branch name in-addition of master.
• Update bats to the forked bats-core as the original repository is no longer maintained.

[xuoutput]

bump

[jbsmith7741]

This is exactly what I was looking for as well.

@paulirish Is this okay to be merged?

[paulirish]

God damn this is a beautiful PR. @phwt thank you.

@jbsmith7741 you have any feelings about using -b as the short flag here? feels weird to me, but -i is already taken.

maybe -r and --root instead? I don't care that much either way.

[jbsmith7741]

I don't have a strong preference, maybe -m for main/master or -d for default branch.