Log Message:
p5-DBD-CSV: update to 0.51.

0.51	- 2018-03-24, H.Merijn Brand
    * Dot-in-inc (cpantesters)

0.50	- 2018-03-21, H.Merijn Brand
    * Explain more about header folding
    * It's 2017
    * BOM handling
    * Some documentation enhancements
    * Ignore DBI_DSN if it is not CSV
    * It's 2018
    * Test with perl-5.26, DBI-1.641, SQL::Statement-1.412, and
      Text::CSV_XS-1.35