fix(watchers): restore tests

tests/watch.spec.js

@@ -0,0 +1,32 @@
+import Spruce from '../dist/spruce'
+import Alpine from 'alpinejs'
+import { waitFor } from '@testing-library/dom'
+
+beforeEach(() => {
+    Spruce.subscribers = []
+})
+
+beforeAll(() => {
+    window.Spruce = Spruce
+    window.Alpine = Alpine
+})
+
+test('.watch() > can listen for changes to property', async () => {
+    let fixture = undefined
+    
+    Spruce.store('example', {
+        cool: 'stuff'
+    })
+
+    Spruce.watch('example.cool', (value) => {
+        fixture = value
+    })
+
+    await Spruce.start()
+
+    expect(fixture).toBeUndefined()
+
+    Spruce.stores.example.cool = 'amazing'
+
+    expect(fixture).toEqual('amazing')
+})