Improve wasm32 build

[andrewdavidmackenzie]

Fixes #206

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Project coverage is 25%. Comparing base (876bdf5) to head (2676edf).
Report is 18 commits behind head on master.

Files with missing lines	Patch %	Lines
piggui/src/piggui.rs	0%	6 Missing ⚠️
piggui/src/views/connection_menu.rs	0%	2 Missing ⚠️
pignet/src/lib.rs	0%	1 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #874   +/-   ##
=====================================
- Coverage      25%    25%   -0%     
=====================================
  Files          41     41           
  Lines        5861   5876   +15     
=====================================
  Hits         1437   1437           
- Misses       4424   4439   +15     

Flag	Coverage Δ
unittests	25% <0%> (-<1%)	⬇️

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