Replace '\n' with EOL from os module

[simon-p-r]

Will you accept a PR for this? Also I cannot view notation of accepted EBNF format that parser will accept, I have tried parsing several simple grammer files but all fail with no real information on what is wrong with them.

[menduz]

You can define EOL in your grammar, you can also take a look at the tests for different grammars.

https://github.com/menduz/node-ebnf/blob/194343232fd61da549abf3995d3dabdee0b7670b/test/NewLang.spec.ts#L140

Sadly EBNF or ABNF are not compatible across every implementation out there because there is no strict standard. Every parser adds its own flavors to the grammar.

[simon-p-r]

Sorry I was not clear, on this line '\n' is used when os.EOL should be used instead. I am new to grammar files and have discovered there is no common format across libraries. I will open PR to fix if you want.

[menduz]

As far as I can see in those files as long as \n is used for error reporting or logs we are good to go!