Resolve ambiguity with apprise.plugins module namespace

While the namespace is physically made of modules, it has been amended
to be the namespace home for the corresponding notifier classes as well.

This turned out to confuse both humans and machines on various ends.

While it has apparently worked for a while, it croaks on Python 3.11
now, and is not considered to have been a good idea in general.

test/test_plugin_twilio.py

@@ -28,8 +28,8 @@ from unittest import mock
 import requests
 import pytest
 from json import dumps
-from apprise import plugins
 from apprise import Apprise
+from apprise.plugins.NotifyTwilio import NotifyTwilio
 from helpers import AppriseURLTester
 
 # Disable logging for a cleaner testing output
@@ -57,7 +57,7 @@ apprise_url_tests = (
     ('twilio://AC{}:{}@{}'.format('a' * 32, 'b' * 32, '3' * 5), {
         # using short-code (5 characters) without a target
         # We can still instantiate ourselves with a valid short code
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
         # Since there are no targets specified we expect a False return on
         # send()
         'notify_response': False,
@@ -69,47 +69,47 @@ apprise_url_tests = (
     ('twilio://AC{}:{}@{}/123/{}/abcd/'.format(
         'a' * 32, 'b' * 32, '3' * 11, '9' * 15), {
         # valid everything but target numbers
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://AC{}:{}@12345/{}'.format('a' * 32, 'b' * 32, '4' * 11), {
         # using short-code (5 characters)
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
 
         # Our expected url(privacy=True) startswith() response:
         'privacy_url': 'twilio://...aaaa:b...b@12345',
     }),
     ('twilio://AC{}:{}@123456/{}'.format('a' * 32, 'b' * 32, '4' * 11), {
         # using short-code (6 characters)
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://AC{}:{}@{}'.format('a' * 32, 'b' * 32, '5' * 11), {
         # using phone no with no target - we text ourselves in
         # this case
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://_?sid=AC{}&token={}&from={}'.format(
         'a' * 32, 'b' * 32, '5' * 11), {
         # use get args to acomplish the same thing
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://_?sid=AC{}&token={}&source={}'.format(
         'a' * 32, 'b' * 32, '5' * 11), {
         # use get args to acomplish the same thing (use source instead of from)
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://_?sid=AC{}&token={}&from={}&to={}'.format(
         'a' * 32, 'b' * 32, '5' * 11, '7' * 13), {
         # use to=
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
     }),
     ('twilio://AC{}:{}@{}'.format('a' * 32, 'b' * 32, '6' * 11), {
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
         # throw a bizzare code forcing us to fail to look it up
         'response': False,
         'requests_response_code': 999,
     }),
     ('twilio://AC{}:{}@{}'.format('a' * 32, 'b' * 32, '6' * 11), {
-        'instance': plugins.NotifyTwilio,
+        'instance': NotifyTwilio,
         # Throws a series of connection and transfer exceptions when this flag
         # is set and tests that we gracfully handle them
         'test_requests_exceptions': True,
@@ -155,7 +155,7 @@ def test_plugin_twilio_auth(mock_post, no_throttling):
     obj = Apprise.instantiate(
         'twilio://{}:{}@{}/{}'
         .format(account_sid, auth_token, source, dest))
-    assert isinstance(obj, plugins.NotifyTwilio) is True
+    assert isinstance(obj, NotifyTwilio) is True
     assert isinstance(obj.url(), str) is True
 
     # Send Notification
@@ -165,7 +165,7 @@ def test_plugin_twilio_auth(mock_post, no_throttling):
     obj = Apprise.instantiate(
         'twilio://{}:{}@{}/{}?apikey={}'
         .format(account_sid, auth_token, source, dest, apikey))
-    assert isinstance(obj, plugins.NotifyTwilio) is True
+    assert isinstance(obj, NotifyTwilio) is True
     assert isinstance(obj.url(), str) is True
 
     # Send Notification
@@ -217,12 +217,12 @@ def test_plugin_twilio_edge_cases(mock_post, no_throttling):
 
     # No account_sid specified
     with pytest.raises(TypeError):
-        plugins.NotifyTwilio(
+        NotifyTwilio(
             account_sid=None, auth_token=auth_token, source=source)
 
     # No auth_token specified
     with pytest.raises(TypeError):
-        plugins.NotifyTwilio(
+        NotifyTwilio(
             account_sid=account_sid, auth_token=None, source=source)
 
     # a error response
@@ -234,7 +234,7 @@ def test_plugin_twilio_edge_cases(mock_post, no_throttling):
     mock_post.return_value = response
 
     # Initialize our object
-    obj = plugins.NotifyTwilio(
+    obj = NotifyTwilio(
         account_sid=account_sid, auth_token=auth_token, source=source)
 
     # We will fail with the above error code