Update Cargo.toml

Author: FinnHuelsbusch

models/rust/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "gbfs_types"
-version = "0.1.2"
+version = "0.1.3"
 edition = "2021"
 license = "Apache-2.0"
 description = "Types for GBFS"
@@ -53,4 +53,4 @@ optional = true
 [dependencies.pyo3]
 version = "0.25"
 features = ["serde"]
-optional = true
+optional = true