graphics/p5-Image-ExifTool: update to 12.30

ExifTool is a platform-independent Perl library plus a command-line application
for reading, writing and editing meta information in a wide variety of files.

ExifTool is at version 12.30 in production release.
Besides minor fixes and improvements, this release is about security fixes.

CVE-2021-22204
Anyone using ExifTool (Version 12.24) can be triggered with a valid image
leading to arbitrary code execution, through
improper neutralization of user data in the DjVu file format

Other security fixes without CVE related.

• Give maintainership to Rafael Grether

Approved by: evin@sevenlayer.studio (maintainer, timeout)
PR: 260590
Security: CVE-2021-22204