fix eslint no-self-compare

Author: yyx990803

src/core/observer/index.js

@@ -162,9 +162,11 @@ export function defineReactive (
     },
     set: function reactiveSetter (newVal) {
       const value = getter ? getter.call(obj) : val
+      /* eslint-disable no-self-compare */
       if (newVal === value || (newVal !== newVal && value !== value)) {
         return
       }
+      /* eslint-enable no-self-compare */
       if (process.env.NODE_ENV !== 'production' && customSetter) {
         customSetter()
       }