Refactor to avoid the use of a special global object.

The global object formerly used is now replaced by direct use
of the namespace opf the globals module. This eliminates the
redundant getters and setters and simplifies the code for
future maintainers.

Note that the globals module name conflicts (harmlessly at
present) with a Python built-in function. A future commit
should rename it `config` to remove this clash and better
represent its intended purpose.

meshtastic/tests/test_init.py

@@ -6,9 +6,8 @@ from unittest.mock import MagicMock
 
 import pytest
 
-from meshtastic import _onNodeInfoReceive, _onPositionReceive, _onTextReceive
+from meshtastic import _onNodeInfoReceive, _onPositionReceive, _onTextReceive, globals
 
-from ..globals import Globals
 from ..serial_interface import SerialInterface
 
 
@@ -16,7 +15,7 @@ from ..serial_interface import SerialInterface
 def test_init_onTextReceive_with_exception(caplog):
     """Test _onTextReceive"""
     args = MagicMock()
-    Globals.getInstance().set_args(args)
+    globals.args = args
     iface = MagicMock(autospec=SerialInterface)
     packet = {}
     with caplog.at_level(logging.DEBUG):
@@ -29,7 +28,7 @@ def test_init_onTextReceive_with_exception(caplog):
 def test_init_onPositionReceive(caplog):
     """Test _onPositionReceive"""
     args = MagicMock()
-    Globals.getInstance().set_args(args)
+    globals.args = args
     iface = MagicMock(autospec=SerialInterface)
     packet = {"from": "foo", "decoded": {"position": {}}}
     with caplog.at_level(logging.DEBUG):
@@ -41,7 +40,7 @@ def test_init_onPositionReceive(caplog):
 def test_init_onNodeInfoReceive(caplog, iface_with_nodes):
     """Test _onNodeInfoReceive"""
     args = MagicMock()
-    Globals.getInstance().set_args(args)
+    globals.args = args
     iface = iface_with_nodes
     iface.myInfo.my_node_num = 2475227164
     packet = {