Updating from 0.X.X to 1.0.0

Version 1.0 introduces some breaking changes in the API for effects and guards:

• Both functions receive a single object with multiple keys instead of multiple parameters.
• Effects now receive the context.
• The context updater function inside effect is now called setContext instead of update.

Here's a diff between the fetch example on versions 0.x.x and 1.0.0: