Signed-off-by: Rémy Coutable <remy@rymai.me>

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This has changed because `has_driving_license` is now marked as
user-scoped, which reduces its score. This has the affect of changing
the order of conditions, in addition to the score change being reflected
in the debug output.

This method take the cache, and the list of dirty condition keys, and:

- removes these keys from the cache, marking the conditions as needing
  recomputation.
- finds all runners (i.e. pre-cached abilities) that depend on these
  conditions and marks them as needing re-computation.

All other conditions and abilities are unaffected.

JRuby requires 2.5.0 bounds.

Tested manually on rbx-5.0 and jruby-9.2.17.0

This makes some changes that allow us to test with other interpreters,
such as Rubinius and JRuby

This restores the existing behavior, with a special case for
anonymous classes.

This fixes regular problems with deadlocks in the test suite. This
appears to be directly related to
https://bugs.ruby-lang.org/issues/17494, where refined methods can fail
lookup. Investigation in GDB identifies precisely the same code-path.

Alex Kalderimis authored Jun 02, 2021 and Matthias Käppler committed Jun 02, 2021

This is the block passed to `Policy.rule`. These specs define
which operations are permitted.

This includes some minor changes to the debug spec to account for the
new `banned` condition.

These include tests to verify inference (the use of `can?`) and the
identity between the declarative API and the nested explicit
definitions.

Alex Kalderimis authored May 27, 2021 and Alex Kalderimis committed Jun 01, 2021

Add a page documenting how caching works and how policies can be written
to take advantage of it.

This adds feature specs that verify the claims made in the docs.

An active-record rubocop rule is completely disabled, since this library
does not depend on any AR code.