Implement simulate method

[richfitz]

Basically just copied and pasted from dust, one of the missing methods that we need in order to merge the packages, but also the most useful of the missing methods.

[codecov]

Codecov Report

Merging #35 (fe31adc) into main (180be09) will not change coverage.
The diff coverage is n/a.

❗ Current head fe31adc differs from pull request most recent head 4c1caf3. Consider uploading reports for the commit 4c1caf3 to get more accurate results

@@           Coverage Diff           @@
##             main      #35   +/-   ##
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  Coverage   96.00%   96.00%           
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  Files           3        3           
  Lines          75       75           
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  Hits           72       72           
  Misses          3        3           

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