1.8.7 fixes
Merge pull request #1306 from heroku/187-fix

1.8.7 fixes
added debugging for auth
Merge pull request #1305 from heroku/debug

added debugging for auth
v3.17.1
show warning if HEROKU_API_KEY is set
Merge pull request #1308 from heroku/auth-warning

show warning if HEROKU_API_KEY is set
upgraded gems (notably netrc, heroku-api and excon)
fixed tests