OSC::Message#decode: Parsing an empty string field raises exception

[HuBandiT]

https://github.com/maca/ruby-osc/blob/3d9f6fb344b7aa9c028fff155febf72069fe89db/lib/ruby-osc/message.rb#L49

I think the regexp, instead of expecting at least one non-NUL character ([^\000]+) should allow zero characters ([^\000]*).