Possible NPE in DateGenerator

[Anvell]

Hello, the DateGenerator class would benefit from additional null check:

    @Override
    protected Matcher getDefaultMatcher() {
        return f -> f.getName().equals("date");
    }

to

    @Override
    protected Matcher getDefaultMatcher() {
        return f -> f.getName() != null && f.getName().contains("date");
    }

Currently it would crash when no RandomValue annotation is provided to some of the fields or default values are supplied in a data class constructor.