Fix external $refs

[drwpow]

Partial workaround for #321. Converts $ref: 'foo.yaml#bar' to any for now.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@fcde6da). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #354   +/-   ##
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  Coverage        ?   92.57%           
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  Files           ?        5           
  Lines           ?      256           
  Branches        ?       88           
=======================================
  Hits            ?      237           
  Misses          ?       13           
  Partials        ?        6           

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