seq. IDs → alphanumeric hashes; embedding broken

[jm3]

looks like Asciinema switched to ASCII hashes / chunk IDs instead of sequential numeric IDs, which jekyll-asciinema doesn't seem to like:

% ruby --version
ruby 2.4.2p198 (2017-09-14 revision 59899) [x86_64-darwin16]

% bundle list | grep ascii
  * jekyll-asciinema (0.2.0)

... foo.md:
{% asciicast 'lMotMSXHCbqpgIxcBse0BOsPU' %}

...jekyll: 
Liquid Exception: Syntax error in tag 'asciicast' while parsing the following markup:
  'lMotMSXHCbqpgIxcBse0BOsPU' Valid syntax: {% asciicast 123456 %} in 
  ~jm3/sites/blog.jm3.net/_posts/2018/10-02-asciinema.md

I tried with and without quotes; let me know if I'm missing something.

FWIW, the actual embed markup to be generated (linked above) is unchanged; the plugin just needs to pass them through like the numeric IDs — i.e., this works:

<script
  src="https://asciinema.org/a/lMotMSXHCbqpgIxcBse0BOsPU.js"
  id="asciicast-lMotMSXHCbqpgIxcBse0BOsPU" async></script>

[mnuessler]

Thanks a lot for taking the time to report the issue!