Peggy can't parse superfluous semicolons

[gamesaucer]

Steps to reproduce: Parse the following grammar:

Start = Part*; ;
Part = .

Expected result: It is a valid Peggy grammar, since the separation of its rules is not ambiguous.
Actual result: It is not a valid Peggy grammar.

This happens because Peggy does not accept duplicated semicolons. I suppose not fixing this could be justified with the reasoning that duplicated semicolons are almost certainly a mistake on the part of the programmer, but I wanted to at least point out this limitation.

[hildjj]

This one I might be open to changing. However, I want to make sure I can capture the extra semis in peggy-eslint-parser first. Will leave this open to discussion.

[hildjj]

After looking at peggy-eslint-parser, this is still an easy fix. Including in v3.0.1.

[reverofevil]

Thanks for pointing this out!