Text::CSV_XS 0.98 under Perl 5.18.1 causes test failures; require 0.99

The most telling failure is in fromcsv.t, while parsing this:

    foo,bar,baz
    "foo
    loo","bar loo", baz

resulting in:

    Expected:
    {"zip":["foo","bar","baz"]}
    {"zip":["foo\nloo","bar loo","baz"]}
    Output from module:
    {"zip":["foo","bar","baz"]}
    {"zip":["\"foo"]}
    {"zip":["loo\"","bar loo","baz"]}

The same parsing bug caused failures in FilenameKey.t as well.
Merge pull request #36 from tsibley/csv-dep-on-5.18

Text::CSV_XS 0.98 under Perl 5.18.1 causes test failures; require 0.99