Add remote urls to git-repo-info package

[Green-Ranger11]

This is from this comment. Currently, we have are using git-repo-info to infer the current sha in can-merge. We are using this package as it doesn't depend on whether git is installed so users who have not installed git can use can-merge however it does not have an implementation for getting remote urls which we are parsing to get the repository names.

This still means that in getRepo() we are still using git to get repository as shown below:

	const getRepos = String(execSync(`git ls-remote --get-url ${remote}`));
	const pushRepoRegex = /(?<=github\.com(?:\/|:))(?:.*)(?=\.git*)/gm;
	return getRepos.match(pushRepoRegex)[0];

We can add a PR to git-repo-info to implement getting the different remote urls.

[ljharb]

Linking to rwjblue/git-repo-info#63