enable color by default if stdout is a TTY

[svix-frank]

Closes #7.

[tasn]

I don't know golang, though I guess it's fine? Assuming this works on linux, macos and windows?
Is it possible to disable it? --no-color or something when it's on?

[svix-frank]

I don't know golang, though I guess it's fine? Assuming this works on linux, macos and windows?
Is it possible to disable it? --no-color or something when it's on?

Yeah it works on all platforms.
Currently you can pass --color=false to disable, although a --no-color flag sounds clearer.
Updated to reflect that suggestion.

[tasn]

--color=false actually sounds better! Maybe do that?

[svix-frank]

--color=false actually sounds better! Maybe do that?

Okay, reverted!