Improve the computation of collisions

Full Changelog: v1.5.1...v1.6.0

Technical release because I forgot to update a version number...

Bump the version number in package.json.

Avoid blocking the CPU for too long during computation

The plugin now schedules itself through timeouts and promises to run the collision computation in an asynchronous manner, so as not to hold the CPU for too long. This makes the map zooming/panning/etc. smoother.

Full Changelog: v1.4.0...v1.5.0

Technical release because of old dependencies

This release only fixes a couple of details in the examples and update the dev dependencies to more recent ones.