utf8ToHex in Convert.ts doesn't add insignificant zero while converting 0-15 control characters

[yaaccount]

Which will probably render encrypt/decrypt not working on strings containing 0x00-0x0f.
Same issue in convert.js in the js lib.

[rg911]

seems working fine for me

Convert.utf8ToHex('00x0 Hello Word') => 303078302048656c6c6f20576f7264

[yaaccount]

Try String.fromCodePoint(0x00) + "Hello world"

[rg911]

Addressed. well spotted @yaaccount 👍

[evias]

fixed in 0.12.3