Add option to control timeout

[dieghernan]

Default timeout value is 300 seconds getOption("mapspain_timeout", 300L) , can be controlled with options(mapspain_timeout) (e.g. options(mapspain_timeout = 0.01) ~ 10 milliseconds).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.96%. Comparing base (5e35f5c) to head (bc5af63).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #133   +/-   ##
=======================================
  Coverage   99.96%   99.96%           
=======================================
  Files          42       42           
  Lines        2768     2769    +1     
=======================================
+ Hits         2767     2768    +1     
  Misses          1        1           

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