Add a codegen error type to avoid unwraps
diff --git a/codegen/src/version.rs b/codegen/src/version.rs
index fab7907..7ccca60 100644
--- a/codegen/src/version.rs
+++ b/codegen/src/version.rs
@@ -1,15 +1,16 @@
+use crate::error::Result;
 use semver::Version;
 use serde::Deserialize;
 
 use std::fs;
 use std::path::Path;
 
-pub fn get() -> Version {
+pub fn get() -> Result<Version> {
     let codegen_root = Path::new(env!("CARGO_MANIFEST_DIR"));
     let syn_cargo_toml = codegen_root.join("../Cargo.toml");
-    let manifest = fs::read_to_string(syn_cargo_toml).unwrap();
-    let parsed: Manifest = toml::from_str(&manifest).unwrap();
-    parsed.package.version
+    let manifest = fs::read_to_string(syn_cargo_toml)?;
+    let parsed: Manifest = toml::from_str(&manifest)?;
+    Ok(parsed.package.version)
 }
 
 #[derive(Debug, Deserialize)]