Test migration to jest by hand

Apparently using regular expressions is way easier.

test/lowercaseKeys/lowercaseKeys.js

@@ -0,0 +1,6 @@
+const lowercaseKeys = obj =>
+Object.keys(obj).reduce((acc, key) => {
+acc[key.toLowerCase()] = obj[key];
+return acc;
+}, {
+module.exports = lowercaseKeys;