Update Emcryption

[martindsouza]

See latest package from @antonscheffer https://github.com/antonscheffer/as_crypto

[martindsouza]

@antonscheffer can we have your permission to integrate into OOS Utils? Thanks

[antonscheffer]

You already have that permission, see #112

[martindsouza]

Thanks. Just wanted to ensure with the additional features that you just added.