Ruby 2.7 Deprecation warning - fixed in 7.0 - can it be added to v 6.4.x?

[wizardofelves]

Hi all,

In February 2021 adrianmann submitted this PR to address this issue: #46

It was merged into version 7 of paperclip by ssinghi

Is it possible to have this PR also merged into V6 of paperclip and a new version of 6.4.x be pushed and released?

The PR in question: #48

[ssinghi]

@wizardofelves done

https://github.com/kreeti/kt-paperclip/releases/tag/v6.4.2

[wizardofelves]

Thanks!