Add option to throw the original exception

[bm77525-kr]

I know the original error message is included when retries are exhausted, but it would be great to have the option to bubble up the original error instance itself stack trace and all. This would, of course, not be expected to be enabled by default as it would be a breaking change to existing functionality, but I imagine it could be enabled via the options.

[vcfvct]

on vacation.
make sense. would take a look later 😄

[wells1013]

+1

[vcfvct]

closing this.
Addressed by #23 .