fix: change EOL characters to Unix

[edkerk]

• run dos2unix on all code, changing EOL to LF, which is Unix default

[codecov-io]

Codecov Report

Merging #68 into devel will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##            devel      #68   +/-   ##
=======================================
  Coverage   97.83%   97.83%           
=======================================
  Files           2        2           
  Lines         185      185           
  Branches       23       23           
=======================================
  Hits          181      181           
  Misses          3        3           
  Partials        1        1

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[BenjaSanchez]

thanks @edkerk!