style(test): Import files in a more sensible way to test the package entry

Author: Kent C. Dodds

test/flatten.test.js

@@ -1,5 +1,5 @@
 import test from 'ava'
-import flatten from '../src/flatten'
+import {flatten} from '../src'
 
 test('flattens an array of arrays', t => {
   const original = [[1, 2], 3, [4, 5]]

test/snake-to-camel.test.js

@@ -1,5 +1,5 @@
 import test from 'ava'
-import snakeToCamel from '../src/snake-to-camel'
+import {snakeToCamel} from '../src'
 
 test('converts snake-case to camelCase', t => {
   const original = 'snake-case-string'