lightr 2.1.0

New features

• lr_get_spec(), lr_get_metadata() and lr_convert_tocsv() have a new
  parser argument. This argument can be used to force the use of a
  specific parser defined in this package, or to pass a custom parser function
  defined by the user (#3).

Minor changes

• Performance improvements:
  • lr_parse_oceanoptics_jdx: ~2x faster
  • lr_parse_oceanoptics_jaz: ~1.5x faster