Empty Date give Exception

[LiteLessomoroff]

Describe the bug
Error happened on dbf table init, in constructor, where exists date field and it do not contains date(empty).
Before adding date column(which may be empty) in dbf file, it worked fine.

To Reproduce
Steps to reproduce the behavior:

1. Create dbf which contains field date type and set empty value to this
2. Initialize DbfTable
   using (var dbfTable = new DbfTable(dbfPath, Encoding.UTF8))// it must fall

Expected behavior
Change mapping to DateTime?(or type which using in this operation with ? - nullable) - if possible or set it to default date value