Fix the non-working geovec parsing. Move positional options to kwargs in parse_R,J,B

[joa-quim]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 97.75281% with 2 lines in your changes missing coverage. Please review.

Project coverage is 85.81%. Comparing base (175263d) to head (65646e4).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/psxy.jl	83.33%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1616      +/-   ##
==========================================
+ Coverage   85.79%   85.81%   +0.02%     
==========================================
  Files         148      148              
  Lines       20700    20709       +9     
==========================================
+ Hits        17760    17772      +12     
+ Misses       2940     2937       -3     

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