Custom context for reporting on github

[roopakv]

Do you want to request a feature or report a bug?
Feature: Allow passing a flag on the cli or config to use a custom name for the context which will help in most monorepo cases.

What is the current behavior?
Uses the context name bundlewatch

If the current behavior is a bug, please provide the steps to reproduce.
Not a bug

What is the expected behavior?

bundlewatch --custom-context "bundlewatch-app-frontend"

should use the name bundlewatch-app-frontend

If this is a feature request, what is motivation or use case for changing the behavior?
This feature will allow reporting multiple times for a commit without overwriting the previous commits.

Please mention other relevant information such as the browser version, Node.js version, bundlewatch version, and Operating System.
NA

[roopakv]

If people are open to exploring this, happy to put up a PR which will make this possible.