fix #57

[jeffreyhanson]

• Update read_spp_range_data() and create_spp_info_data() to fix
  incompatibility issue with latest version of the BirdLife species range
  dataset (incompatibilties with latest version of BirdLife range data #57). Thanks to Jianqiao Zhao for the bug report.
• Update create_spp_aoh_data() and create_spp_frc_data() so that they
  provide a correct error message when the argument to x does not
  contain an "id_no" column.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.33%. Comparing base (d6e1d75) to head (ed66efd).

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #58   +/-   ##
=======================================
  Coverage   97.33%   97.33%           
=======================================
  Files          44       44           
  Lines        3420     3421    +1     
=======================================
+ Hits         3329     3330    +1     
  Misses         91       91           

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