fix: prevent panic if query has no question

Cargo.lock

@@ -1008,7 +1008,7 @@ dependencies = [
 
 [[package]]
 name = "pkdns"
-version = "0.1.1"
+version = "0.1.2"
 dependencies = [
  "any-dns",
  "clap",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "pkdns"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

src/pknames_resolver.rs

@@ -46,7 +46,11 @@ impl PknamesResolver {
             return pkarr_result; // It was a pkarr hostname
         }
 
-        let question = original_query.questions.first().unwrap();
+        let question = original_query.questions.first();
+        if let None = question {
+
+        }
+        let question = original_query.questions.first().ok_or("Query does not include a question.")?;
         let domain = question.qname.to_string();
         let pkarr_domain = self.predict_pknames_domain(&domain)?;