fix(worker): add missing utils.rs

worker/src/utils.rs

@@ -0,0 +1,16 @@
+use serde::de::{self, Deserialize, Deserializer, Unexpected};
+
+// src: https://github.com/serde-rs/serde/issues/1344#issuecomment-410309140
+pub fn bool_from_int<'de, D>(deserializer: D) -> Result<bool, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    match u8::deserialize(deserializer)? {
+        0 => Ok(false),
+        1 => Ok(true),
+        other => Err(de::Error::invalid_value(
+            Unexpected::Unsigned(other as u64),
+            &"zero or one",
+        )),
+    }
+}