Fix command line parsing when there is a '=' in the path

[caesay]

Closes #350

[codecov]

Codecov Report

Attention: Patch coverage is 45.74468% with 51 lines in your changes missing coverage. Please review.

Project coverage is 45.75%. Comparing base (779ecf2) to head (eed988e).
Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/bins/src/shared/cli_host.rs	0.00%	23 Missing ⚠️
src/bins/src/update.rs	69.35%	19 Missing ⚠️
src/bins/src/setup.rs	0.00%	7 Missing ⚠️
src/bins/src/stub.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #385      +/-   ##
===========================================
+ Coverage    45.66%   45.75%   +0.09%     
===========================================
  Files          224      225       +1     
  Lines        13641    13675      +34     
  Branches      1249     1249              
===========================================
+ Hits          6229     6257      +28     
- Misses        7097     7103       +6     
  Partials       315      315              

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