fix: make menu.popup options optional (#13977)

* add empty object as default param for options

* update docs

* add spec for optional options

* fix: add null check for options

spec/api-menu-spec.js

@@ -633,10 +633,16 @@ describe('Menu module', () => {
 
     it('throws an error if options is not an object', () => {
       expect(() => {
-        menu.popup()
+        menu.popup('this is a string, not an object')
       }).to.throw(/Options must be an object/)
     })
 
+    it('allows for options to be optional', () => {
+      expect(() => {
+        menu.popup({})
+      }).to.not.throw()
+    })
+
     it('should emit menu-will-show event', (done) => {
       menu.on('menu-will-show', () => { done() })
       menu.popup({window: w})