Update rand requirement from 0.7 to 0.8

Author: CAD97

Cargo.toml

@@ -77,7 +77,7 @@ bevy_internal = {path = "crates/bevy_internal", version = "0.4.0", default-featu
 
 [dev-dependencies]
 anyhow = "1.0"
-rand = "0.7.3"
+rand = "0.8.0"
 ron = "0.6.2"
 serde = {version = "1", features = ["derive"]}
 

crates/bevy_asset/Cargo.toml

@@ -33,7 +33,7 @@ thiserror = "1.0"
 downcast-rs = "1.2.0"
 notify = { version = "5.0.0-pre.2", optional = true }
 parking_lot = "0.11.0"
-rand = "0.7.3"
+rand = "0.8.0"
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 wasm-bindgen = { version = "0.2" }

crates/bevy_ecs/Cargo.toml

@@ -20,7 +20,7 @@ trace = []
 bevy_tasks = { path = "../bevy_tasks", version = "0.4.0" }
 bevy_utils = { path = "../bevy_utils", version = "0.4.0" }
 bevy_ecs_macros = { path = "macros", version = "0.4.0" }
-rand = "0.7.3"
+rand = "0.8.0"
 serde = "1.0"
 thiserror = "1.0"
 fixedbitset = "0.3.1"