1.2.0: improvements, bug fixing and ci

* ci: publish.yml triggers on push/pr in master

* fix: sha and deploy btn adopt the new GitHub UI

* feature: support 2 deployable URLs
homepage & commit details view

* fix: display btn only appears in homepage and deployable URL.
it also hides when not matching owner & repo from settings popup.

* bump version to 1.2.0

* ci: publish only in master push