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/wire.py

@@ -1,13 +1,16 @@
 # Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
 
+from typing import Iterator, Optional, Tuple
+
 import contextlib
 import struct
 
 import dns.exception
 import dns.name
 
+
 class Parser:
-    def __init__(self, wire, current=0):
+    def __init__(self, wire: bytes, current: int = 0):
         self.wire = wire
         self.current = 0
         self.end = len(self.wire)
@@ -15,46 +18,47 @@ class Parser:
             self.seek(current)
         self.furthest = current
 
-    def remaining(self):
+    def remaining(self) -> int:
         return self.end - self.current
 
-    def get_bytes(self, size):
+    def get_bytes(self, size: int) -> bytes:
+        assert size >= 0
         if size > self.remaining():
             raise dns.exception.FormError
-        output = self.wire[self.current:self.current + size]
+        output = self.wire[self.current : self.current + size]
         self.current += size
         self.furthest = max(self.furthest, self.current)
         return output
 
-    def get_counted_bytes(self, length_size=1):
-        length = int.from_bytes(self.get_bytes(length_size), 'big')
+    def get_counted_bytes(self, length_size: int = 1) -> bytes:
+        length = int.from_bytes(self.get_bytes(length_size), "big")
         return self.get_bytes(length)
 
-    def get_remaining(self):
+    def get_remaining(self) -> bytes:
         return self.get_bytes(self.remaining())
 
-    def get_uint8(self):
-        return struct.unpack('!B', self.get_bytes(1))[0]
+    def get_uint8(self) -> int:
+        return struct.unpack("!B", self.get_bytes(1))[0]
 
-    def get_uint16(self):
-        return struct.unpack('!H', self.get_bytes(2))[0]
+    def get_uint16(self) -> int:
+        return struct.unpack("!H", self.get_bytes(2))[0]
 
-    def get_uint32(self):
-        return struct.unpack('!I', self.get_bytes(4))[0]
+    def get_uint32(self) -> int:
+        return struct.unpack("!I", self.get_bytes(4))[0]
 
-    def get_uint48(self):
-        return int.from_bytes(self.get_bytes(6), 'big')
+    def get_uint48(self) -> int:
+        return int.from_bytes(self.get_bytes(6), "big")
 
-    def get_struct(self, format):
+    def get_struct(self, format: str) -> Tuple:
         return struct.unpack(format, self.get_bytes(struct.calcsize(format)))
 
-    def get_name(self, origin=None):
+    def get_name(self, origin: Optional["dns.name.Name"] = None) -> "dns.name.Name":
         name = dns.name.from_wire_parser(self)
         if origin:
             name = name.relativize(origin)
         return name
 
-    def seek(self, where):
+    def seek(self, where: int) -> None:
         # Note that seeking to the end is OK!  (If you try to read
         # after such a seek, you'll get an exception as expected.)
         if where < 0 or where > self.end:
@@ -62,7 +66,8 @@ class Parser:
         self.current = where
 
     @contextlib.contextmanager
-    def restrict_to(self, size):
+    def restrict_to(self, size: int) -> Iterator:
+        assert size >= 0
         if size > self.remaining():
             raise dns.exception.FormError
         saved_end = self.end
@@ -78,7 +83,7 @@ class Parser:
             self.end = saved_end
 
     @contextlib.contextmanager
-    def restore_furthest(self):
+    def restore_furthest(self) -> Iterator:
         try:
             yield None
         finally: