0.2.0 release

[0.2.0] - 2020-07-15

Added

• This changelog :)
• If the public/secret key file is missing, while trying to create a Johnny object will raise FileNotFound error.
• If one tries to decrypt using a public key file, it will throw AttributeError.
• encrypt_bytes now returns bytes (instead of string).
• encrypt_bytes takes a third argument, armor as boolean, to return ascii-armored bytes or not.
• encrypt_file takes a third argument, armor as boolean, writes the output file ascii armored if true.