Fixes rollup config

Author: ctrlplusb

rollup.config.js

@@ -5,7 +5,7 @@ const packageJson = require('./package.json')
 process.env.BABEL_ENV = 'production'
 
 module.exports = {
-  external: ['immer', 'redux', 'redux-thunk'],
+  external: ['immer', 'memoize-one', 'redux', 'redux-thunk'],
   input: 'src/index.js',
   output: {
     file: `dist/${packageJson.name}.js`,