propagate features to dioxus serve

#122 fixed `--features` for `dioxus build`, this PR adds the same for `dioxus serve`

src/cli/serve/mod.rs

@@ -30,6 +30,10 @@ impl Serve {
         if self.serve.profile.is_some() {
             crate_config.set_profile(self.serve.profile.unwrap());
         }
+        
+        if self.serve.features.is_some() {
+            crate_config.set_features(self.serve.features.unwrap());
+        }
 
         let platform = self.serve.platform.unwrap_or_else(|| {
             crate_config