Bump dnspython from 2.3.0 to 2.4.2 (#2123)

* Bump dnspython from 2.3.0 to 2.4.2

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.3.0 to 2.4.2.
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/master/doc/whatsnew.rst)
- [Commits](https://github.com/rthalley/dnspython/compare/v2.3.0...v2.4.2)

---
updated-dependencies:
- dependency-name: dnspython
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Update dnspython==2.4.2

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

[skip ci]

lib/dns/versioned.py

@@ -2,10 +2,9 @@
 
 """DNS Versioned Zones."""
 
-from typing import Callable, Deque, Optional, Set, Union
-
 import collections
 import threading
+from typing import Callable, Deque, Optional, Set, Union
 
 import dns.exception
 import dns.immutable
@@ -32,7 +31,6 @@ Transaction = dns.zone.Transaction
 
 
 class Zone(dns.zone.Zone):  # lgtm[py/missing-equals]
-
     __slots__ = [
         "_versions",
         "_versions_lock",
@@ -152,7 +150,7 @@ class Zone(dns.zone.Zone):  # lgtm[py/missing-equals]
             #
             # This is not a problem with Threading module threads as
             # they cannot be canceled, but could be an issue with trio
-            # or curio tasks when we do the async version of writer().
+            # tasks when we do the async version of writer().
             # I.e. we'd need to do something like:
             #
             # try: