PYSCAN-26: Refactor the type hints to work with Python 3.8 (#7)

Author: joke1196

src/py_sonar_scanner/configuration.py

@@ -17,11 +17,11 @@
 # along with this program; if not, write to the Free Software Foundation,
 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #
+from __future__ import annotations
 import argparse
 import os
 import sys
 from typing import Union
-
 import toml
 
 

src/py_sonar_scanner/environment.py

@@ -17,6 +17,7 @@
 # along with this program; if not, write to the Free Software Foundation,
 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #
+from __future__ import annotations
 import os
 import platform
 import shutil

src/py_sonar_scanner/scanner.py

@@ -17,6 +17,7 @@
 # along with this program; if not, write to the Free Software Foundation,
 # Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #
+from __future__ import annotations
 import logging
 from logging import Logger
 import threading