A little extra test coverage for byte literals (#182)

Author: illicitonion

num_enum/tests/try_from_primitive.rs

@@ -161,6 +161,8 @@ fn discriminant_expressions() {
         Four = 4u8,
         Five,
         Six = ONE + ONE + 2u8 + 2,
+        Seven = b'\x07',
+        Eight = b'\x07' + ONE,
     }
 
     let zero: Result<Enum, _> = 0u8.try_into();
@@ -186,6 +188,12 @@ fn discriminant_expressions() {
 
     let six: Result<Enum, _> = 6u8.try_into();
     assert_eq!(six, Ok(Enum::Six));
+
+    let seven: Result<Enum, _> = 7u8.try_into();
+    assert_eq!(seven, Ok(Enum::Seven));
+
+    let eight: Result<Enum, _> = 8u8.try_into();
+    assert_eq!(eight, Ok(Enum::Eight));
 }
 
 #[cfg(feature = "complex-expressions")]