Edge support

[Alex-----]

Edge does not support the import() function used in lib/argon2.js. Also, https://antelle.net/argon2-browser/ does not work in Edge because TextEncoder is not defined.

[antelle]

Hi! I've fixed the demo in Edge.
Most likely you won't load the file like this in production, so import should be used only for making a demo / prototype. You can export loadArgon2WasmModule function to load the file properly in Edge.
For TextEncoder/Decoder, you will need a polyfill, which should be bundled separately indeed.