Use dompdf 2.x

[BrunoSpy]

dompdf 1.2 branch has security issues ( https://nvd.nist.gov/vuln/detail/CVE-2022-28368 ) that are fixed only in 2.x

[zluiten]

Thanks @BrunoSpy for bringing that up. I've created a 0.7 release which allows dompdf v2.

[BrunoSpy]

Tested and approved :) Thx.