fix: fixes #198 darwin should switch to monochrome mode

[jamesgalvan]

go test -v -p 1 ./test/tty -ginkgo.focus monochrome

=== RUN   TestIntegration
Running Suite: Integration tests
================================
Random Seed: 1744924125
Will run 2 of 20 specs

SSSSSSSSSSSSSSSSS
------------------------------
• [SLOW TEST:7.386 seconds]
Showing a basic webpage
browsh/interfacer/test/tty/tty_test.go:16
  Rendering
  browsh/interfacer/test/tty/tty_test.go:166
    should switch to monochrome mode
    browsh/interfacer/test/tty/tty_test.go:193
------------------------------
• [SLOW TEST:7.377 seconds]
Showing a basic webpage
browsh/interfacer/test/tty/tty_test.go:16
  Rendering
  browsh/interfacer/test/tty/tty_test.go:166
    darwin should switch to monochrome mode
    browsh/interfacer/test/tty/tty_test.go:200
------------------------------
S
Ran 2 of 20 Specs in 24.916 seconds
SUCCESS! -- 2 Passed | 0 Failed | 0 Pending | 18 Skipped
--- PASS: TestIntegration (24.92s)
PASS
ok  	github.com/browsh-org/browsh/interfacer/test/tty	25.357s

[tombh]

Thank you. Ideally we should have customisable keybindings, but this is a nice little addition for now.

[tombh]

Oh, it's been so long since we ran the tests that CI can't even install Firefox anymore. I'll fix that.