fix(schema) do not allow final slash in upstream_url (Kong#2115)

v0.9.9

chore(release) 0.9.8 (Kong#2001)

wip

Merge pull request Kong#1923 from Mashape/hotfix/oauth2-migration

v0.9.6

release(0.9.5)

hotfix(changelog) broken link

Merge pull request Kong#1724 from Mashape/release/0.9.3

release: 0.9.3