Update youtube-dl to 2018.6.14

[pyup-bot]

This PR updates youtube-dl from 2018.6.11 to 2018.6.14.

Changelog

2018.06.14

Core
* [downloader/http] Fix retry on error when streaming to stdout (16699)

Extractors
+ [discoverynetworks] Add support for disco-api videos (16724)
+ [dailymotion] Add support for password protected videos (9789)
+ [abc:iview] Add support for livestreams (12354)
* [abc:iview] Fix extraction (16704)
+ [crackle] Add support for sonycrackle.com (16698)
+ [tvnet] Add support for tvnet.gov.vn (15462)
* [nrk] Update API hosts and try all previously known ones (16690)
* [wimp] Fix Youtube embeds extraction

Links

• PyPI: https://pypi.org/project/youtube-dl
• Changelog: https://pyup.io/changelogs/youtube-dl/
• Repo: https://github.com/rg3/youtube-dl

Resolves #193