fix dependency/version issues (bump to 0.1.2)

Makefile

@@ -1,4 +1,4 @@
-.PHONY: check install
+.PHONY: check install dist upload
 
 check:
 	@mypy . || true
@@ -7,3 +7,9 @@ check:
 
 install:
 	pip install --user -e .
+
+dist:
+	python3 -m build
+
+upload: dist
+	python3 -m twine upload dist/*

megacom/__init__.py

@@ -12,8 +12,7 @@ import threading
 import tty
 import queue
 from types import TracebackType
-from typing import Any, BinaryIO, Iterable, List, Optional, Tuple, Type
-from typing_extensions import Literal
+from typing import Any, BinaryIO, Iterable, List, Literal, Optional, Tuple, Type
 
 import serial
 import serial_asyncio

setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as f:
 
 setup(
     name='megacom',
-    version='0.1.1',
+    version='0.1.2',
     description='Alternative console-based UART client',
     long_description=long_description,
     long_description_content_type='text/markdown',
@@ -18,7 +18,7 @@ setup(
         "pyserial",
         "pyserial-asyncio"
     ],
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     classifiers=[
         "Programming Language :: Python :: 3",
         "License :: OSI Approved :: GNU Affero General Public License v3",