Make released artifacts smaller

[bollwyvl]

References

• more progress towards Reduce size of installed packages, initial load impact #63

Changes

• cut some more unused js assets
  • 17mb integration.min.js is the big win
  • needs more verification
• remove duplicated whl assets with techniques from fix: make python package smaller bqplot/bqplot#1228
• move tests out-of-tree
• rework coverage
• look again at separating out the fancy shapes, templates, stencils, etc.

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.04%. Comparing base (2ad777a) to head (67e0144).

Files with missing lines	Patch %	Lines
py_packages/ipydrawio/src/ipydrawio/__init__.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #106       +/-   ##
===========================================
- Coverage   97.12%   59.04%   -38.09%     
===========================================
  Files          21       14        -7     
  Lines         730      542      -188     
  Branches       78       76        -2     
===========================================
- Hits          709      320      -389     
- Misses         12      220      +208     
+ Partials        9        2        -7     

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[bollwyvl]

previous

87.6 MB ipydrawio-1.2.1-py3-none-any.whl
41.5 MB ipydrawio-1.2.1.tar.gz

current sizes

   24.9 MiB [##########]  ipydrawio-1.2.2-py3-none-any.whl                                                                  
   22.9 MiB [######### ]  ipydrawio-1.2.2.tar.gz
    6.0 MiB [##        ]  ipydrawio_mathjax-1.2.2-py3-none-any.whl
    5.9 MiB [##        ]  ipydrawio-mathjax-1.2.2.tar.gz
   84.0 KiB [          ]  deathbeds-ipydrawio-1.2.2.tgz
   72.0 KiB [          ]  ipydrawio-export-1.2.2.tar.gz
   68.0 KiB [          ]  ipydrawio_export-1.2.2-py3-none-any.whl
   28.0 KiB [          ]  deathbeds-ipydrawio-jupyter-templates-1.2.2.tgz
   24.0 KiB [          ]  deathbeds-ipydrawio-webpack-20.5.0.tgz
   24.0 KiB [          ]  ipydrawio_widgets-1.2.2-py3-none-any.whl
   20.0 KiB [          ]  ipydrawio-widgets-1.2.2.tar.gz
   16.0 KiB [          ]  deathbeds-ipydrawio-pdf-1.2.2.tgz
   12.0 KiB [          ]  deathbeds-ipydrawio-notebook-1.2.2.tgz
    8.0 KiB [          ]  deathbeds-ipydrawio-mathjax-1.2.2.tgz
    4.0 KiB [          ]  SHA256SUMS