Add dyn to traits and bump Rust version

wasmtime-runtime/src/instance.rs

@@ -441,7 +441,7 @@ impl Instance {
     }
 
     /// Return a reference to the custom state attached to this instance.
-    pub fn host_state(&mut self) -> &mut Any {
+    pub fn host_state(&mut self) -> &mut dyn Any {
         &mut *self.host_state
     }
 
@@ -855,7 +855,7 @@ impl InstanceHandle {
     }
 
     /// Return a reference to the custom state attached to this instance.
-    pub fn host_state(&mut self) -> &mut Any {
+    pub fn host_state(&mut self) -> &mut dyn Any {
         self.instance_mut().host_state()
     }
 

wasmtime-runtime/src/vmcontext.rs

@@ -527,7 +527,7 @@ impl VMContext {
     ///
     /// This is unsafe because it doesn't work on just any `VMContext`, it must
     /// be a `VMContext` allocated as part of an `Instance`.
-    pub unsafe fn host_state(&mut self) -> &mut Any {
+    pub unsafe fn host_state(&mut self) -> &mut dyn Any {
         self.instance().host_state()
     }