Catch old matlab versions
Following the readme.md initialize.m is the first thing to execute. But with Matlab Versions prior 2021a the jsonencode will produce an error that does not hint to this.
It is mentioned clearly in the readme to use a newer version, but I'd still implement an error with verLessThan to notice the user of this.
Additionally a default config.json should be provided (in the readme ?) so it could be created manually.