update workflow, semi fix integrated updater

scripts/update-version-workflow.py

@@ -0,0 +1,41 @@
+from datetime import datetime
+# import urllib.request
+
+# response = urllib.request.urlopen('https://blackjack4494.github.io/youtube-dlc/update/LATEST_VERSION')
+# _LATEST_VERSION = response.read().decode('utf-8')
+
+exec(compile(open('youtube_dlc/version.py').read(), 'youtube_dlc/version.py', 'exec'))
+
+_LATEST_VERSION = locals()['__version__']
+
+_OLD_VERSION = _LATEST_VERSION.rsplit("-", 1)
+
+if len(_OLD_VERSION) > 0:
+    old_ver = _OLD_VERSION[0]
+
+old_rev = ''
+if len(_OLD_VERSION) > 1:
+    old_rev = _OLD_VERSION[1]
+
+ver = f'{datetime.today():%Y.%m.%d}'
+rev = ''
+
+if old_ver == ver:
+    if old_rev:
+        rev = int(old_rev) + 1
+    else:
+        rev = 1
+
+_SEPARATOR = '-'
+
+version = _SEPARATOR.join(filter(None, [ver, str(rev)]))
+
+print('::set-output name=ydlc_version::' + version)
+
+file_version_py = open('youtube_dlc/version.py', 'rt')
+data = file_version_py.read()
+data = data.replace(locals()['__version__'], version)
+file_version_py.close()
+file_version_py = open('youtube_dlc/version.py', 'wt')
+file_version_py.write(data)
+file_version_py.close()