If a repo has a PR template, revup should open a PR using the template

[Ashton-Sidhu]

Is your feature request related to a problem? Please describe.

For projects that require you open PRs according to a specific template, it would be awesome if revup opens the PR using that template, even if it doesn't fill in all the sections of the template.

Describe the solution you'd like

When opening a PR with revup, open it with the repos PR template

Thanks for creating this project, it's simplified the amount of commands I run during my dev process.