Update flask to 2.0.0

[pyup-bot]

This PR updates Flask from 1.0.2 to 2.0.0.

Changelog

2.0.0

-------------

Released 2021-05-11

-   Drop support for Python 2 and 3.5.
-   Bump minimum versions of other Pallets projects: Werkzeug >= 2,
 Jinja2 >= 3, MarkupSafe >= 2, ItsDangerous >= 2, Click >= 8. Be sure
 to check the change logs for each project. For better compatibility
 with other applications (e.g. Celery) that still require Click 7,
 there is no hard dependency on Click 8 yet, but using Click 7 will
 trigger a DeprecationWarning and Flask 2.1 will depend on Click 8.
-   JSON support no longer uses simplejson. To use another JSON module,
 override ``app.json_encoder`` and ``json_decoder``. :issue:`3555`
-   The ``encoding`` option to JSON functions is deprecated. :pr:`3562`
-   Passing ``script_info`` to app factory functions is deprecated. This
 was not portable outside the ``flask`` command. Use
 ``click.get_current_context().obj`` if it's needed. :issue:`3552`
-   The CLI shows better error messages when the app failed to load
 when looking up commands. :issue:`2741`
-   Add :meth:`sessions.SessionInterface.get_cookie_name` to allow
 setting the session cookie name dynamically. :pr:`3369`
-   Add :meth:`Config.from_file` to load config using arbitrary file
 loaders, such as ``toml.load`` or ``json.load``.
 :meth:`Config.from_json` is deprecated in favor of this. :pr:`3398`
-   The ``flask run`` command will only defer errors on reload. Errors
 present during the initial call will cause the server to exit with
 the traceback immediately. :issue:`3431`
-   :func:`send_file` raises a :exc:`ValueError` when passed an
 :mod:`io` object in text mode. Previously, it would respond with
 200 OK and an empty file. :issue:`3358`
-   When using ad-hoc certificates, check for the cryptography library
 instead of PyOpenSSL. :pr:`3492`
-   When specifying a factory function with ``FLASK_APP``, keyword
 argument can be passed. :issue:`3553`
-   When loading a ``.env`` or ``.flaskenv`` file, the current working
 directory is no longer changed to the location of the file.
 :pr:`3560`
-   When returning a ``(response, headers)`` tuple from a view, the
 headers replace rather than extend existing headers on the response.
 For example, this allows setting the ``Content-Type`` for
 ``jsonify()``. Use ``response.headers.extend()`` if extending is
 desired. :issue:`3628`
-   The ``Scaffold`` class provides a common API for the ``Flask`` and
 ``Blueprint`` classes. ``Blueprint`` information is stored in
 attributes just like ``Flask``, rather than opaque lambda functions.
 This is intended to improve consistency and maintainability.
 :issue:`3215`
-   Include ``samesite`` and ``secure`` options when removing the
 session cookie. :pr:`3726`
-   Support passing a ``pathlib.Path`` to ``static_folder``. :pr:`3579`
-   ``send_file`` and ``send_from_directory`` are wrappers around the
 implementations in ``werkzeug.utils``. :pr:`3828`
-   Some ``send_file`` parameters have been renamed, the old names are
 deprecated. ``attachment_filename`` is renamed to ``download_name``.
 ``cache_timeout`` is renamed to ``max_age``. ``add_etags`` is
 renamed to ``etag``. :pr:`3828, 3883`
-   ``send_file`` passes ``download_name`` even if
 ``as_attachment=False`` by using ``Content-Disposition: inline``.
 :pr:`3828`
-   ``send_file`` sets ``conditional=True`` and ``max_age=None`` by
 default. ``Cache-Control`` is set to ``no-cache`` if ``max_age`` is
 not set, otherwise ``public``. This tells browsers to validate
 conditional requests instead of using a timed cache. :pr:`3828`
-   ``helpers.safe_join`` is deprecated. Use
 ``werkzeug.utils.safe_join`` instead. :pr:`3828`
-   The request context does route matching before opening the session.
 This could allow a session interface to change behavior based on
 ``request.endpoint``. :issue:`3776`
-   Use Jinja's implementation of the ``|tojson`` filter. :issue:`3881`
-   Add route decorators for common HTTP methods. For example,
 ``app.post("/login")`` is a shortcut for
 ``app.route("/login", methods=["POST"])``. :pr:`3907`
-   Support async views, error handlers, before and after request, and
 teardown functions. :pr:`3412`
-   Support nesting blueprints. :issue:`593, 1548`, :pr:`3923`
-   Set the default encoding to "UTF-8" when loading ``.env`` and
 ``.flaskenv`` files to allow to use non-ASCII characters. :issue:`3931`
-   ``flask shell`` sets up tab and history completion like the default
 ``python`` shell if ``readline`` is installed. :issue:`3941`
-   ``helpers.total_seconds()`` is deprecated. Use
 ``timedelta.total_seconds()`` instead. :pr:`3962`
-   Add type hinting. :pr:`3973`.

1.1.2

-------------

Released 2020-04-03

-   Work around an issue when running the ``flask`` command with an
 external debugger on Windows. :issue:`3297`
-   The static route will not catch all URLs if the ``Flask``
 ``static_folder`` argument ends with a slash. :issue:`3452`

1.1.1

-------------

Released 2019-07-08

-   The ``flask.json_available`` flag was added back for compatibility
 with some extensions. It will raise a deprecation warning when used,
 and will be removed in version 2.0.0. :issue:`3288`

1.1.0

-------------

Released 2019-07-04

-   Bump minimum Werkzeug version to >= 0.15.
-   Drop support for Python 3.4.
-   Error handlers for ``InternalServerError`` or ``500`` will always be
 passed an instance of ``InternalServerError``. If they are invoked
 due to an unhandled exception, that original exception is now
 available as ``e.original_exception`` rather than being passed
 directly to the handler. The same is true if the handler is for the
 base ``HTTPException``. This makes error handler behavior more
 consistent. :pr:`3266`

 -   :meth:`Flask.finalize_request` is called for all unhandled
     exceptions even if there is no ``500`` error handler.

-   :attr:`Flask.logger` takes the same name as
 :attr:`Flask.name` (the value passed as
 ``Flask(import_name)``. This reverts 1.0's behavior of always
 logging to ``"flask.app"``, in order to support multiple apps in the
 same process. A warning will be shown if old configuration is
 detected that needs to be moved. :issue:`2866`
-   :meth:`flask.RequestContext.copy` includes the current session
 object in the request context copy. This prevents ``session``
 pointing to an out-of-date object. :issue:`2935`
-   Using built-in RequestContext, unprintable Unicode characters in
 Host header will result in a HTTP 400 response and not HTTP 500 as
 previously. :pr:`2994`
-   :func:`send_file` supports :class:`~os.PathLike` objects as
 described in PEP 0519, to support :mod:`pathlib` in Python 3.
 :pr:`3059`
-   :func:`send_file` supports :class:`~io.BytesIO` partial content.
 :issue:`2957`
-   :func:`open_resource` accepts the "rt" file mode. This still does
 the same thing as "r". :issue:`3163`
-   The :attr:`MethodView.methods` attribute set in a base class is used
 by subclasses. :issue:`3138`
-   :attr:`Flask.jinja_options` is a ``dict`` instead of an
 ``ImmutableDict`` to allow easier configuration. Changes must still
 be made before creating the environment. :pr:`3190`
-   Flask's ``JSONMixin`` for the request and response wrappers was
 moved into Werkzeug. Use Werkzeug's version with Flask-specific
 support. This bumps the Werkzeug dependency to >= 0.15.
 :issue:`3125`
-   The ``flask`` command entry point is simplified to take advantage
 of Werkzeug 0.15's better reloader support. This bumps the Werkzeug
 dependency to >= 0.15. :issue:`3022`
-   Support ``static_url_path`` that ends with a forward slash.
 :issue:`3134`
-   Support empty ``static_folder`` without requiring setting an empty
 ``static_url_path`` as well. :pr:`3124`
-   :meth:`jsonify` supports :class:`dataclasses.dataclass` objects.
 :pr:`3195`
-   Allow customizing the :attr:`Flask.url_map_class` used for routing.
 :pr:`3069`
-   The development server port can be set to 0, which tells the OS to
 pick an available port. :issue:`2926`
-   The return value from :meth:`cli.load_dotenv` is more consistent
 with the documentation. It will return ``False`` if python-dotenv is
 not installed, or if the given path isn't a file. :issue:`2937`
-   Signaling support has a stub for the ``connect_via`` method when
 the Blinker library is not installed. :pr:`3208`
-   Add an ``--extra-files`` option to the ``flask run`` CLI command to
 specify extra files that will trigger the reloader on change.
 :issue:`2897`
-   Allow returning a dictionary from a view function. Similar to how
 returning a string will produce a ``text/html`` response, returning
 a dict will call ``jsonify`` to produce a ``application/json``
 response. :pr:`3111`
-   Blueprints have a ``cli`` Click group like ``app.cli``. CLI commands
 registered with a blueprint will be available as a group under the
 ``flask`` command. :issue:`1357`.
-   When using the test client as a context manager (``with client:``),
 all preserved request contexts are popped when the block exits,
 ensuring nested contexts are cleaned up correctly. :pr:`3157`
-   Show a better error message when the view return type is not
 supported. :issue:`3214`
-   ``flask.testing.make_test_environ_builder()`` has been deprecated in
 favour of a new class ``flask.testing.EnvironBuilder``. :pr:`3232`
-   The ``flask run`` command no longer fails if Python is not built
 with SSL support. Using the ``--cert`` option will show an
 appropriate error message. :issue:`3211`
-   URL matching now occurs after the request context is pushed, rather
 than when it's created. This allows custom URL converters to access
 the app and request contexts, such as to query a database for an id.
 :issue:`3088`

1.0.4

-------------

Released 2019-07-04

-   The key information for ``BadRequestKeyError`` is no longer cleared
 outside debug mode, so error handlers can still access it. This
 requires upgrading to Werkzeug 0.15.5. :issue:`3249`
-   ``send_file`` url quotes the ":" and "/" characters for more
 compatible UTF-8 filename support in some browsers. :issue:`3074`
-   Fixes for PEP451 import loaders and pytest 5.x. :issue:`3275`
-   Show message about dotenv on stderr instead of stdout. :issue:`3285`

1.0.3

-------------

Released 2019-05-17

-   :func:`send_file` encodes filenames as ASCII instead of Latin-1
 (ISO-8859-1). This fixes compatibility with Gunicorn, which is
 stricter about header encodings than PEP 3333. :issue:`2766`
-   Allow custom CLIs using ``FlaskGroup`` to set the debug flag without
 it always being overwritten based on environment variables.
 :pr:`2765`
-   ``flask --version`` outputs Werkzeug's version and simplifies the
 Python version. :pr:`2825`
-   :func:`send_file` handles an ``attachment_filename`` that is a
 native Python 2 string (bytes) with UTF-8 coded bytes. :issue:`2933`
-   A catch-all error handler registered for ``HTTPException`` will not
 handle ``RoutingException``, which is used internally during
 routing. This fixes the unexpected behavior that had been introduced
 in 1.0. :pr:`2986`
-   Passing the ``json`` argument to ``app.test_client`` does not
 push/pop an extra app context. :issue:`2900`

Links

• PyPI: https://pypi.org/project/flask
• Changelog: https://pyup.io/changelogs/flask/
• Homepage: https://palletsprojects.com/p/flask

[pyup-bot]

Closing this in favor of #105