Fix Windows error

Author: VirxEC

codegen/class_inject.rs

@@ -13,6 +13,11 @@ pub fn classes_to_lib_rs(type_data: &[PythonBindType]) -> io::Result<()> {
 
     let mut lib_rs = fs::read_to_string("src/lib.rs")?;
 
+    #[cfg(windows)]
+    {
+        lib_rs = lib_rs.replace("\r\n", "\n");
+    }
+
     let start = lib_rs.find("    classes: [\n").unwrap();
     let end = lib_rs[start..].find("],").unwrap() + 2;