Include bevy serialization when enabling serde feature

Cargo.toml

 [package]
 name = "micro_banimate"
-version = "0.9.0"
+version = "0.9.1"
 edition = "2021"
 license = "Apache-2.0"
 description = "Easily manage complex Bevy 2D sprite animations"
@@ -18,7 +18,7 @@ required-features = ["json_loader"]
 default = ["json_loader"]
 json_loader = ["serde", "dep:serde_json"]
 toml_loader = ["serde", "dep:toml"]
-serde = ["dep:serde"]
+serde = ["dep:serde", "bevy/serialize"]
 
 [dependencies]
 anyhow = "^1.0"