Update dependencies.

lightbeam/src/disassemble.rs

@@ -7,7 +7,7 @@ pub fn disassemble(
     mem: &[u8],
     mut ops: &[(AssemblyOffset, impl Display)],
 ) -> Result<(), Box<dyn Error>> {
-    let mut cs = Capstone::new()
+    let cs = Capstone::new()
         .x86()
         .mode(arch::x86::ArchMode::Mode64)
         .build()?;

lightbeam/src/lib.rs

@@ -20,6 +20,7 @@ extern crate lazy_static;
 #[cfg(test)]
 #[macro_use]
 extern crate quickcheck;
+#[cfg(test)]
 extern crate wabt;
 // Just so we can implement `Signature` for `cranelift_codegen::ir::Signature`
 extern crate cranelift_codegen;