test(util): Fix failing test

Author: David Emory

Diff for: __tests__/util/index.js

@@ -1,11 +1,11 @@
 /* globals describe, expect, it */
 
-import util from '../../lib/util'
+import {addVectors} from '../../lib/util'
 
 describe('util', () => {
   it('addVectors should work', () => {
     const vec1 = { x: 1, y: 2 }
     const vec2 = { x: 3, y: 4 }
-    expect(util.addVectors(vec1, vec2)).toEqual({ x: 4, y: 6 })
+    expect(addVectors(vec1, vec2)).toEqual({ x: 4, y: 6 })
   })
 })