Adding Bootique to the list of projects that work with Caffeine

[andrus]

A specific Bootique/Caffeine example is provided here: https://github.com/bootique-examples/bootique-jcache-examples/tree/3.x/jcache-caffeine-example

[CLAassistant]

All committers have signed the CLA.

[ben-manes]

Can you make it flow with the rest of the rendered text? You'll notice that it is shaped, as ragged text is harder to skim. Probably the shorter "A minimally opinionated framework" is enough to not look like an outlier, and can then be ordered to maintain the triangular form.

[andrus]

Done.