Special characters break encrypt/decrypt

[Uroc327]

Having certain special characters in the fields causes them to be printed wrongly after encrypting and decrypting.

With

{ "_public_key": "...", "test": "aaa<bbb>ccc^ddd~eee&fff" }

and after

ejson encrypt test.ejson
ejson decrypt test.ejson

I get back aaa\u003cbbb\u003eccc^ddd~eee\u0026fff as secret.

[runlevel5]

@Uroc327 good find, while waiting for the core team to address this issue, you could try my own Rust port implementation which does not experience the same issue