CIRCLE_PR_NUMBER variable should be available in all PRs

envars

#1

Currently, the CIRCLE_PR_NUMBER variable is only available in PRs created from forks of a repository. It should be available in the main repository too. Many of us don’t work off forks or not off forks alone. If we’re using the variable in CI processes then it appearing intermittently is confusing, if not actually a bug.


#2