Does not support go_package option with semi-colon in proto

[akshaylb]

Lileio does not currently handle proto files containing go_package options of the following type as supported by this issue

option go_package = "github.com/example/foo;bar";

Some examples of such usage can be found in some common googleapis.

[arbarlow]

Hi there, I'm afraid I don't have the time or need for this at the moment and I'm not sure how to use. Please could you elaborate or open a pull request. Thanks