test: add tests for mode function

Author: codebender828

packages/chakra-ui-core/src/utils/color-mode-observer.js

@@ -6,7 +6,6 @@ export const defineColorModeObserver = ({ colorMode, theme, icons } = {}) => Vue
   icons
 })
 
-
 /**
  * This observed store object observed the colorMode and stores it in an
  * observed object that other components can consume.

packages/chakra-ui-core/src/utils/color-mode-observer.test.js

@@ -1,6 +1,5 @@
 import { mode, defineColorModeObserver } from './color-mode-observer'
 
-
 describe('colorModeObserver', () => {
   it('`colorModeObserver` should provide and observe values', () => {
     const baseTheme = {