Fix Typo on Parser() Parameter "segmentSeperator"

[oosswwaalldd]

I do not know if this was intended or it is just a typo, but I think it should be segmentSeparator instead of (current) segmentSeperator, along with the other variable names that also have this (possible) typo (see

simple-hl7/lib/hl7/parser.js

Line 11 in 3e81365

this.delimiters = {

)