esper 3.4-3.6

Performance-focused release with major internal optimizations.

Changes

• Optimized get_components to iterate over the smallest set of entities, drastically speeding up queries with rare components.
• Implemented lazy cache invalidation to reduce overhead from frequent entity modifications.
• Sped up get_processor and remove_processor to be constant time (O(1)) operations.
• Minor performance improvements to entity creation and deletion routines.
• Expanded Benchmarks.
• Add a new try_remove_component function as a convenience instead of (has_component + remove_component).
• Start migrating type hints to the modern syntax.
• esper.remove_handler should use a reference instead of direct object comparison. (#107)