readme-2.19.0

[YamatoSecurity]

@fukusuket Could you check this over and could I ask you to do update the Japanese translations?

Also closes #754

[YamatoSecurity]

@fukusuket I forgot to mention, could you also update support-modifier.py to support the new modifiers (lt, etc..)?

I noticed that fieldref|startswith and fieldref|contains are not listed in the supported field modifiers, so can you add these?

[fukusuket]

LGTM!!🚀 I updated Japanese README and supported-modifier.py!

[fukusuket]

I noticed that fieldref|startswith and fieldref|contains are not listed in the supported field modifiers, so can you add these?

I updated!!💪

[YamatoSecurity]

Thanks so much for the update!
One more thing, could you also add the following to the supported modifiers: startswith|cased, endswith|cased, contains|cased

I think we should document because I forgot how cased gets used. 😄

[YamatoSecurity]

I added the cased variations to the readme. Could you update the JP translation one more time?

[fukusuket]

Yes, I updated it!!💪