Bump dnspython from 2.0.0 to 2.2.0 (#1618)

* Bump dnspython from 2.0.0 to 2.2.0

Bumps [dnspython]() from 2.0.0 to 2.2.0.

---
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==2.2.0

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/asyncbackend.py

@@ -2,9 +2,12 @@
 
 import dns.exception
 
+# pylint: disable=unused-import
+
 from dns._asyncbackend import Socket, DatagramSocket, \
     StreamSocket, Backend  # noqa:
 
+# pylint: enable=unused-import
 
 _default_backend = None
 
@@ -18,13 +21,14 @@ class AsyncLibraryNotFoundError(dns.exception.DNSException):
 
 
 def get_backend(name):
-    """Get the specified asychronous backend.
+    """Get the specified asynchronous backend.
 
     *name*, a ``str``, the name of the backend.  Currently the "trio",
     "curio", and "asyncio" backends are available.
 
     Raises NotImplementError if an unknown backend name is specified.
     """
+    # pylint: disable=import-outside-toplevel,redefined-outer-name
     backend = _backends.get(name)
     if backend:
         return backend
@@ -50,6 +54,7 @@ def sniff():
     Returns the name of the library, or raises AsyncLibraryNotFoundError
     if the library cannot be determined.
     """
+    # pylint: disable=import-outside-toplevel
     try:
         if _no_sniffio:
             raise ImportError