make Clippy happy

src/containers/vbyte.rs

@@ -108,7 +108,7 @@ mod tests {
     }
 
     #[test]
-    #[should_panic]
+    #[should_panic(expected = "vbyte too large")]
     fn test_decode_too_large() {
         init();
         let mut buffer = encode_vbyte(usize::MAX);

src/hdt_graph.rs

@@ -164,7 +164,7 @@ impl Graph for HdtGraph {
         P: TermMatcher + 's,
         O: TermMatcher + 's,
     {
-        use HdtMatcher::*;
+        use HdtMatcher::{Constant, Other};
         let xso = match self.unpack_matcher(&sm, &IdKind::Subject) {
             None => return Box::new(iter::empty()),
             Some(x) => x,

src/lib.rs

@@ -71,6 +71,8 @@ fn query(hdt: Hdt)
 #![allow(clippy::doc_markdown)]
 #![allow(clippy::if_not_else)]
 #![allow(clippy::into_iter_without_iter)]
+// multiple versions of syn crate in transitive dependencies
+#![allow(clippy::multiple_crate_versions)]
 /// Types for storing and reading data.
 pub mod containers;
 // Types for representing dictionaries.