Revert "Remove 'static' bound for P::State in Program::run_with"

This reverts commit cab9dec626.

Wasm needs the `'static'` bound since the runtime
will run in a background task.

src/program.rs

@@ -166,7 +166,10 @@ impl<P: Definition> Program<P> {
 
     /// Runs the underlying [`Application`] of the [`Program`] with a
     /// closure that creates the initial state.
-    pub fn run_with(self, initialize: impl Fn() -> P::State + Clone) -> Result
+    pub fn run_with(
+        self,
+        initialize: impl Fn() -> P::State + Clone + 'static,
+    ) -> Result
     where
         Self: 'static,
     {