Instaloader

- Get higher Post video and StoryItem image quality if logged-in (712)
- Enable default request timeout of 300 seconds to fix indefinite wait with bad connection (810, 870)
- Advertise PEP 561 compliance
- Save content using original filenames by using `{filename}` token in `--filename-pattern` (892, 893)
- Fix efficiency bug in download_profiles() regarding the download of stories (724)
- `--slide` parameter to allow selecting range to download from a sidecar (739, 749)

Thanks to AndreaRe9, fireattack and thomas694 for contributing to this release!

This is a **pre-release**. Install with

pip3 install --pre [--upgrade] instaloader

Fix invalid handling of login redirect response, typically printed as

HTTP redirect from https://www.instagram.com/graphql/query to https://www.instagram.com/accounts/login/
JSON Query to graphql/query: 429 Too Many Requests: redirected to login

- Avoid additional HTTP request to get owner ID of a Post (809)
- Update stories query to include all fields for `tappable_objects` (647, 871, 872)
- Fix HTTP error 500 when accessing stories in certain cases (795)
- Fix a `KeyError` in certain cases when fetching post metadata fails (824)
- Fix `Hashtag.get_all_posts()` missing one post in certain cases (853)
- Throw `LoginRequiredException` when accessing `Post.get_likes()` anonymously, as Instagram now requires to be logged in for accessing likes of a post (860)

Thanks to ingo-m and Ristovski for contributing to this release!

- Fixed wrong "Profile does not exist" error (778, 785)
- Slightly adjust rate controlling mechanism according to recent observations (774)

- Slightly adjust rate controlling mechanism according to recent observations (774)
- Fix accessing `:saved` target in some rare cases (563)
- Fix an unnecessary query when processing a sidecar post with `--no-pictures --no-videos` being set

- Fix some video download edge cases: (776)
- Fix downloading of sidecar videos if `--no-pictures` is set (763)
- Fix downloading of videos that do not have a thumbnail image (773)
- Fix support for (outdated) Python version 3.5 prior to 3.5.4 (765, 777)
- Fix FileExistsError (Windows only) when replacing an already-downloaded picture (769, 775)
- Improve message that is printed upon 429 response