Upgrade CSVHelper to last version

[brunomartinspro]

The last version of CsvHelper.Excel is incompatible with .Net Framework >= 461, it seems a lot of things have changed in the CSVHelper project.

The main issue seems to be the ICsvParser interface, that was dropped since Renamed interfaces to remove Csv from them.

[developerxnz]

Hey, any progress on this?

[carloshgamboa]

Any progress on this?

[youngcm2]

Here is an active fork.

https://github.com/youngcm2/CsvHelper.Excel