v1.1.0-beta4

• (#187) Remove spek-subject-extension dependency from spek-junit-platform-engine, it will now be an opt-in feature.
• (#186) Added CachingMode.SCOPE for memoized - it has the same semantics of the beforeGroup fixture.
• (#176) Handle exceptions gracefully during discovery phase.
• (#178) Ensure fixtures are always executed last.
• (#172) Allow local delegation for LifecycleAware objects.
• (#171) Make InstanceFactory more lenient.
• (#166) Ignore abstract classes.
• (#154) Don't allow fixtures inside action scopes.