Upgrade youtube_dl to 2018.12.03

[fabaff]

Description

Changelog: https://github.com/rg3/youtube-dl/blob/master/ChangeLog

Tested with the following configuration:

media_extractor:

Service call:

{  
   "entity_id":"media_player.mpd",
   "media_content_id":"https://www.youtube.com/watch?v=PA_m-ppThPM",
   "media_content_type":"music"
}

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.