Merge pull request #486 from Jer-Pha/bugfix/ISSUE-483

[Fixes #483] Add __all__ to __init__.py to support mypy --strict usage

Author: jdepoix

youtube_transcript_api/__init__.py

@@ -27,3 +27,30 @@
     YouTubeDataUnparsable,
     PoTokenRequired,
 )
+
+__all__ = [
+    "YouTubeTranscriptApi",
+    "TranscriptList",
+    "Transcript",
+    "FetchedTranscript",
+    "FetchedTranscriptSnippet",
+    "YouTubeTranscriptApiException",
+    "CookieError",
+    "CookiePathInvalid",
+    "CookieInvalid",
+    "TranscriptsDisabled",
+    "NoTranscriptFound",
+    "CouldNotRetrieveTranscript",
+    "VideoUnavailable",
+    "VideoUnplayable",
+    "IpBlocked",
+    "RequestBlocked",
+    "NotTranslatable",
+    "TranslationLanguageNotAvailable",
+    "FailedToCreateConsentCookie",
+    "YouTubeRequestFailed",
+    "InvalidVideoId",
+    "AgeRestricted",
+    "YouTubeDataUnparsable",
+    "PoTokenRequired",
+]