Hello.

Would it be possible to add tests and test files for:

• CVE-2021-25292 fixed in 3bce145
• CVE-2021-27921 and CVE-2021-27923 fixed in 480f681 - there is a ICNS file in a test for CVE-2021-27922 but no BLP and ICO files for the mentioned CVEs.

Files for verification of the fixes are more than enough, I'd happily contribute tests with them.

Thanks for considering this.