Bump dnspython from 2.2.1 to 2.3.0 (#1975)

* Bump dnspython from 2.2.1 to 2.3.0

Bumps [dnspython](https://github.com/rthalley/dnspython) from 2.2.1 to 2.3.0.
- [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/v2.2.1...v2.3.0)

---
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==2.3.0

---------

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/opcode.py

@@ -20,6 +20,7 @@
 import dns.enum
 import dns.exception
 
+
 class Opcode(dns.enum.IntEnum):
     #: Query
     QUERY = 0
@@ -45,7 +46,7 @@ class UnknownOpcode(dns.exception.DNSException):
     """An DNS opcode is unknown."""
 
 
-def from_text(text):
+def from_text(text: str) -> Opcode:
     """Convert text into an opcode.
 
     *text*, a ``str``, the textual opcode
@@ -58,7 +59,7 @@ def from_text(text):
     return Opcode.from_text(text)
 
 
-def from_flags(flags):
+def from_flags(flags: int) -> Opcode:
     """Extract an opcode from DNS message flags.
 
     *flags*, an ``int``, the DNS flags.
@@ -66,10 +67,10 @@ def from_flags(flags):
     Returns an ``int``.
     """
 
-    return (flags & 0x7800) >> 11
+    return Opcode((flags & 0x7800) >> 11)
 
 
-def to_flags(value):
+def to_flags(value: Opcode) -> int:
     """Convert an opcode to a value suitable for ORing into DNS message
     flags.
 
@@ -81,7 +82,7 @@ def to_flags(value):
     return (value << 11) & 0x7800
 
 
-def to_text(value):
+def to_text(value: Opcode) -> str:
     """Convert an opcode to text.
 
     *value*, an ``int`` the opcode value,
@@ -94,7 +95,7 @@ def to_text(value):
     return Opcode.to_text(value)
 
 
-def is_update(flags):
+def is_update(flags: int) -> bool:
     """Is the opcode in flags UPDATE?
 
     *flags*, an ``int``, the DNS message flags.
@@ -104,6 +105,7 @@ def is_update(flags):
 
     return from_flags(flags) == Opcode.UPDATE
 
+
 ### BEGIN generated Opcode constants
 
 QUERY = Opcode.QUERY