Export get and set Utils From Project (#8)

Added get and set to the top level exports
so they can be used by consumers of the
library.

This is helpful for e2e tests where we want
to be able to change the status of the toolbar
on the fly.

src/index.ts

@@ -1,5 +1,5 @@
 import { MSWToolbar } from './component/MSWToolbar';
-import { createUtils } from './utils';
+import { createUtils, set, get } from './utils';
 
-export { MSWToolbar, createUtils };
+export { MSWToolbar, createUtils, set, get };
 export * from './types';