Feature request: support options for custom separator and delimiter values

[Manjack21]

The issue

"CSV" files created on windows operating systems, will contain a number of different separators and delimiters, depending on the regional settings of the host. This also applies to certain Linux distributions (looking at you ubuntu).
In the current implementation only the comma separator(,) and double-quote delimiter(") are supported, as stated in the RFC.

requested feature

It should be possible to define custom separator and delimiter values, via the option object. These values should be optional and default to comma and double-quote.

[Manjack21]

I would like to implement this feature in the fork https://github.com/Manjack21/csv and provide a pull request when it's ready.