Support for custom api endpoints.

See #70, release log:

• 7b50f5e by @rultor: Merge branch '__rultor'
• 6ea325c by @yegor256: pre
• b7306d4 by @afafw: Add description
• c8691f7 by @afafw: Added support for custom endpo...
• 9309d78 by @afafw: Addjusted test to support cust...
• f2bee72 by @renovate[bot]: Update dependency minitest to ...
• b637555 by @renovate[bot]: Update dependency rubocop-rspe...
• afa8b30 by @yegor256: typo
• ca284f1 by @yegor256: extra
• c3d9a1b by @yegor256: year up
• 038a590 by @renovate[bot]: Update dependency rubocop to v...
• 93accca by @renovate[bot]: Update dependency rubocop to v...

Released by Rultor 2.0-SNAPSHOT, see build log