Revert "get rid of `blank_object`"

This reverts commit 9e51c8612d.

src/runtime/internal/Component.ts

@@ -1,6 +1,6 @@
 import { add_render_callback, flush, schedule_update, dirty_components } from './scheduler';
 import { current_component, set_current_component } from './lifecycle';
-import { is_empty, is_function, run, run_all, noop } from './utils';
+import { blank_object, is_empty, is_function, run, run_all, noop } from './utils';
 import { children, detach, start_hydrating, end_hydrating } from './dom';
 import { transition_in } from './transitions';
 
@@ -116,7 +116,7 @@ export function init(component, options, instance, create_fragment, not_equal, p
 		props,
 		update: noop,
 		not_equal,
-		bound: {},
+		bound: blank_object(),
 
 		// lifecycle
 		on_mount: [],
@@ -127,7 +127,7 @@ export function init(component, options, instance, create_fragment, not_equal, p
 		context: new Map(options.context || (parent_component ? parent_component.$$.context : [])),
 
 		// everything else
-		callbacks: {},
+		callbacks: blank_object(),
 		dirty,
 		skip_bound: false,
 		root: options.target || parent_component.$$.root

src/runtime/internal/ssr.ts

@@ -1,5 +1,5 @@
 import { set_current_component, current_component } from './lifecycle';
-import { run_all } from './utils';
+import { run_all, blank_object } from './utils';
 import { boolean_attributes } from '../../shared/boolean_attributes';
 export { is_void } from '../../shared/utils/names';
 
@@ -150,7 +150,7 @@ export function create_ssr_component(fn) {
 			on_mount: [],
 			before_update: [],
 			after_update: [],
-			callbacks: {}
+			callbacks: blank_object()
 		};
 
 		set_current_component({ $$ });

src/runtime/internal/utils.ts

@@ -24,6 +24,10 @@ export function run(fn) {
 	return fn();
 }
 
+export function blank_object() {
+	return Object.create(null);
+}
+
 export function run_all(fns: Function[]) {
 	fns.forEach(run);
 }