Maintainer Vote: `api.context.bind` `context` argument optional or not

[dyladan]

Pursuant to the community guidelines, a vote of the maintainers is required to resolve #78.

Should the context method bind require an explicit context argument or use context.active() as default?

[dyladan]

I vote for explicit context argument

[vmarchaud]

I vote for requiring a context

[obecny]

I vote for context to be optional as it is now.