Bump hackney from 1.12.1 to 1.15.1

[dependabot-preview]

Bumps hackney from 1.12.1 to 1.15.1.

Changelog

Sourced from hackney's changelog.

1.15.1 - 2019-02-26

• fix: don't try to encode encode to IDN with full ASCII names.

this behaviour is similar to curl and fix errors some people had with docker
creating domain names containing a _

• doc: clarify recv_timeout usage
• fix: don't try to encode hostname IPs to IDN
• fix: path encoding to support ( ) characters
• bump mimerl to 1.2
• bump certifi to 2.5.1

1.15.0 - 2019-01-04

• improve multipart: send form with a field names for files
• fix pool checkout_cancel: reduce the number of pending requests

1.14.3 - 2018-09-29

• idna: don't try to encode a unix socket path

1.14.2 - 2018-09-28

• fix: don't IDNA encode the host with unix scheme
• doc: document basic_auth setting

1.14.0 - 2018-09-12

• bump to certifi 2.4.2
• bump to idna 0.6.0
• fix support of rebar2
• fix specs
• add hackney:sockname/1 adn hackney:peername/1 functions
• add new checkout_timeout option for clarity
• improve hackney_url:parse_qs/1 to trim leading and trailing empty values

1.13.0 - 2018-06-22

• fix compatibility with Erlang/OTP 21
• fix parsing query parameters on url without path (#512)
• bump idna to 1.5.2: fix compatibility with rebar2 (#509)

... (truncated)

Commits

• 179c0d6 bump to 1.15.1
• 35316bb use relative dependency for mimeerl
• 8bb07a0 don't try to encode to idna an full ascii name. (#558)
• ea56195 Clarify what recv_timeout means (#555)
• c4c416a Support empty body as list for POST and PUT operations (#553)
• 42875a9 fix idna error with IP addresses
• 221dfae bump to certifi 2.5.1
• 3c09d69 bump certifi version
• c9c7648 bump mimerl to 1.2
• 4a501a0 fixed pathencode to support '(' ')' characters (#551)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #44.