Vendor dependencies for 0.3.0 release

vendor/bevy_platform/src/collections/hash_table.rs

@@ -0,0 +1,6 @@
+//! Provides [`HashTable`]
+
+pub use hashbrown::hash_table::{
+    AbsentEntry, Drain, Entry, ExtractIf, HashTable, IntoIter, Iter, IterHash, IterHashMut,
+    IterMut, OccupiedEntry, VacantEntry,
+};

vendor/bevy_platform/src/collections/mod.rs

@@ -0,0 +1,12 @@
+//! Provides [`HashMap`] and [`HashSet`] from [`hashbrown`] with some customized defaults.
+//!
+//! Also provides the [`HashTable`] type, which is specific to [`hashbrown`].
+
+pub use hash_map::HashMap;
+pub use hash_set::HashSet;
+pub use hash_table::HashTable;
+pub use hashbrown::Equivalent;
+
+pub mod hash_map;
+pub mod hash_set;
+pub mod hash_table;