fix: clone options to avoid sharing state between multiple instances (#96)

see (#95)

src/smart-apollo.js

@@ -9,7 +9,7 @@ class SmartApollo {
   constructor (vm, key, options, autostart = true) {
     this.vm = vm
     this.key = key
-    this.options = options
+    this.options = Object.assign({}, options)
     this._skip = false
     this._watchers = []