* support for One-Time-Passwords (counter- and time based)
* added Argon2Id as the default Key Derivation Function (changeable)
* import to and export from Keepass/KDBX files
* exported encrypted credentials need less space now
* switch search and add-button (#78)
* add own app logging as part of the "Report a bug" - feature (#79)
* smaller improvements and bugfixes
