Fix deprecation warning

[iMacTia]

Description

Fix deprecation warning when providing basic_auth in url.
This can be tested using script/console (which was broken due to missing irb dependency in Gemfile).

# before
conn = Faraday.new('http://Aladdin:open%20sesame@sushi.com/fish')
  # WARNING: `Faraday::Connection#basic_auth` is deprecated; it will be removed in version 2.0.
  # While initializing your connection, use `#request(:basic_auth, ...)` instead.
  # See https://lostisland.github.io/faraday/middleware/authentication for more usage info.
  # => #<Faraday::Connection:0x00007fafe629f9d0

# after
conn = Faraday.new('http://Aladdin:open%20sesame@sushi.com/fish')
  # => #<Faraday::Connection:0x00007fdf352b1f30

[olleolleolle]

Thanks for fixing the warning!