fix: unbreak bundling wretch (#33)

Author: ChALkeR

wretch.browser.js

@@ -1 +1,4 @@
-module.exports = require('wretch')
+const { default: wretch } = require('wretch')
+
+// Removes the .default property from the exported function to deconfuse bundlers
+module.exports = (url, options) => wretch(url, options)

wretch.js

@@ -1,5 +1,5 @@
 // NOTE: does not export Wretcher
-const { default: wretch } = require('./wretch.browser')
+const wretch = require('./wretch.browser')
 const fetch = require('./fetch')
 
 wretch().polyfills({ fetch })