fix unexpected cfg warning (dimforge#573)

Cargo.toml

@@ -2,6 +2,11 @@
 members = ["bevy_rapier2d", "bevy_rapier3d", "bevy_rapier_benches3d"]
 resolver = "2"
 
+[workspace.lints]
+rust.unexpected_cfgs = { level = "warn", check-cfg = [
+    'cfg(feature, values("dim2", "dim3"))',
+] }
+
 [profile.dev]
 # Use slightly better optimization by default, as examples otherwise seem laggy.
 opt-level = 1

bevy_rapier2d/Cargo.toml

@@ -17,6 +17,9 @@ edition = "2021"
 path = "../src/lib.rs"
 required-features = ["dim2"]
 
+[lints]
+workspace = true
+
 [features]
 default = ["dim2", "async-collider", "debug-render-2d"]
 dim2 = []

bevy_rapier3d/Cargo.toml

@@ -17,6 +17,9 @@ edition = "2021"
 path = "../src/lib.rs"
 required-features = ["dim3"]
 
+[lints]
+workspace = true
+
 [features]
 default = ["dim3", "async-collider", "debug-render-3d"]
 dim3 = []