Change repo / package name

[jvivian]

Fixes #89

Before merging, will require changing the repo name in github directly.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 92.1%. Comparing base (ce9419c) to head (e46d476).

Files	Patch %	Lines
dfmdash/cli.py	83.3%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main     #90   +/-   ##
=====================================
  Coverage   92.1%   92.1%           
=====================================
  Files          7       7           
  Lines        319     319           
  Branches      52      52           
=====================================
  Hits         294     294           
  Misses        13      13           
  Partials      12      12           

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