Format and lint codes and fix packaging (#125)

* add: configure files (setup.py->setup.py+setup.cfg+pyproject.toml)

* add: __download_url__

* format with black and isort

* fix: flake8 section in setup.cfg

* add: E501 to flake ignore

* fix: metadata.name does not accept attr

* fix: merge __version__.py into __init__.py

* fix: flake8 errors in tests/

* fix: datetime.datetime -> datetime

* fix: banner

* fix: ignore W605 for banner

* fix: way to install deps in CI

* add: versem to setuptools

* fix: drop python<=3.6 (#126) from package and CI

waybackpy/__init__.py

@@ -1,14 +1,37 @@
-from .wrapper import Url
+__title__ = "waybackpy"
+__description__ = (
+    "Python package that interfaces with the Internet Archive's Wayback Machine APIs. "
+    "Archive pages and retrieve archived pages easily."
+)
+__url__ = "https://akamhy.github.io/waybackpy/"
+__version__ = "3.0.2"
+__download_url__ = (
+    "https://github.com/akamhy/waybackpy/archive/{version}.tar.gz".format(
+        version=__version__
+    )
+)
+__author__ = "Akash Mahanty"
+__author_email__ = "akamhy@yahoo.com"
+__license__ = "MIT"
+__copyright__ = "Copyright 2020-2022 Akash Mahanty et al."
+
+from .availability_api import WaybackMachineAvailabilityAPI
 from .cdx_api import WaybackMachineCDXServerAPI
 from .save_api import WaybackMachineSaveAPI
-from .availability_api import WaybackMachineAvailabilityAPI
-from .__version__ import (
-    __title__,
-    __description__,
-    __url__,
-    __version__,
-    __author__,
-    __author_email__,
-    __license__,
-    __copyright__,
-)
+from .wrapper import Url
+
+__all__ = [
+    "__author__",
+    "__author_email__",
+    "__copyright__",
+    "__description__",
+    "__license__",
+    "__title__",
+    "__url__",
+    "__download_url__",
+    "__version__",
+    "WaybackMachineAvailabilityAPI",
+    "WaybackMachineCDXServerAPI",
+    "WaybackMachineSaveAPI",
+    "Url",
+]