build(deps): update dnspython requirement from ~=2.3.0 to ~=2.4.2

[dependabot]

Updates the requirements on dnspython to permit the latest version.

Release notes

Sourced from dnspython's releases.

dnspython 2.4.2

This is a bug fix release, see the What's New page in the documentation for a summary.

Thanks to the people who reported the bugs and, as usual, thanks to my co-maintainers: Tomáš Křížek, Petr Špaček, and Brian Wellington.

Changelog

Sourced from dnspython's changelog.

2.4.2

• Async queries could wait forever instead of respecting the timeout if the timeout was 0 and a packet was lost. The timeout is now respected.

• Restore HTTP/2 support which was accidentally broken during the https refactoring done as part of 2.4.0.

• When an inception time and lifetime are specified, the signer now sets the expiration to the inception time plus lifetime, instead of the current time plus the lifetime.

2.4.1

• Importing dns.dnssecalgs without the cryptography module installed no longer causes an ImportError.

• A number of timeout bugs with the asyncio backend have been fixed.

• DNS-over-QUIC for the asyncio backend now works for IPv6.

• Dnspython now enforces that the candidate DNSKEYs for DNSSEC signatures have protocol 3 and have the ZONE flag set. This is a standards compliance issue more than a security issue as the legitimate authority would have to have published the non-compliant keys as well as updated their DS record in order for the records to validate (the DS digest includes both flags and protocol). Dnspython will not make invalid keys by default, but does allow them to be created and used for testing purposes.

• Dependency specifications for optional features in the package metadata have been improved.

2.4.0

• Python 3.8 or newer is required.

• The stub resolver now uses instances of dns.nameserver.Nameserver to represent remote recursive resolvers, and can communicate using DNS over UDP/TCP, HTTPS, TLS, and QUIC. In additional to being able to specify an IPv4, IPv6, or HTTPS URL as a nameserver, instances of dns.nameserver.Nameserver are now permitted.

• The DNS-over-HTTPS bootstrap address no longer causes URL rewriting.

• DNS-over-HTTPS now only uses httpx; support for requests has been dropped. A source port may now be supplied when using httpx.

• DNSSEC zone signing with NSEC records is now supported. Thank you

... (truncated)

Commits

• 5278eb3 update whatsnew for 2.4.2
• ef4fab1 Ensure async https() requests are bounded in total time
• 60df484 test inception, expiration, and lifetime when signing
• 6c79315 DNSSEC rrsig_expiration calculation (#977)
• b79e30e 2.4.2 prep
• 52c2dc1 Fix unintended "wait forever" behavior with zero timeouts #976.
• 1d9651c Use HTTP2 when possible in https() #973.
• 5486533 revert dependabot sphinx change as it is too recent for RTD
• 80b3a2c Bump sphinx from 4.3.2 to 7.1.0 (#967)
• ed822ee 2.4.1 versioning
• Additional commits viewable in compare view

You can trigger a rebase of this PR by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[jaredhendrickson13]

@dependabot rebase