flecs_ecs 0.2.0

Rust API for the C/CPP flecs ECS library <https://github.com/SanderMertens/flecs>
mod query_basics;
mod query_chaining_queries;
mod query_change_tracking_1;
mod query_change_tracking_2;
mod query_component_inheritance;
mod query_cyclic_variables;
mod query_facts;
mod query_find_entity;
mod query_group_by;
mod query_group_by_callbacks;
mod query_group_by_custom;
mod query_group_iter;
mod query_hierarchy;
mod query_pass_query_to_system;
mod query_run;
mod query_setting_variables;
mod query_singleton;
mod query_sorting;
mod query_transitive_queries;
mod query_variables;
mod query_wildcard;
mod query_with;
mod query_without;
mod query_world_query;