Option to adjust default text wrap length

The [wrap](https://github.com/ines/wasabi#function-wrap) function takes a `wrap_max` argument that controls the maximum line width. When I'm using the typical functions for printing formatted messages like [good](https://github.com/ines/wasabi#method-printergood-printerfail-printerwarn-printerinfo), [fail](https://github.com/ines/wasabi#method-printergood-printerfail-printerwarn-printerinfo), [warn](https://github.com/ines/wasabi#method-printergood-printerfail-printerwarn-printerinfo), and [info](https://github.com/ines/wasabi#method-printergood-printerfail-printerwarn-printerinfo), they are calling `wrap` internally, and there's no easy way to adjust the line width. The [Printer](https://github.com/ines/wasabi#class-printer) class does have a `line_max` argument, but it's only used for dividers.

Can there be a way to adjust the default `wrap_max` value, either by configuring a `Printer` instance or via an environment variable? I'm using wasabi in my spaCy related projects, and the short 80 character output has been really limiting some of my logging output.