update intl to ^0.19.0

[approachapp]

Hi, would be possible to update intl dependency on dash chat?

[bsns_app] flutter pub get --no-example
Resolving dependencies...
Because dash_chat_2 0.0.20 depends on intl ^0.18.1 and no versions of dash_chat_2 match >0.0.20 <0.1.0, dash_chat_2 ^0.0.20 requires intl ^0.18.1.
So, because bsns_app depends on both intl ^0.19.0 and dash_chat_2 ^0.0.20, version solving failed.
exit code 1

thank you!