Bump marshmallow from 2.18.1 to 3.3.0

[dependabot-preview]

Bumps marshmallow from 2.18.1 to 3.3.0.

Changelog

Sourced from marshmallow's changelog.

3.3.0 (2019-12-05)

Features:

• fields.Nested may take a callable that returns a schema instance. Use this to resolve order-of-declaration issues when schemas nest each other (1146).

# <3.3
class AlbumSchema(Schema):
    title = fields.Str()
    artist = fields.Nested("ArtistSchema", only=("name",))


class ArtistSchema(Schema):
    name = fields.Str()
    albums = fields.List(fields.Nested(AlbumSchema))


# >=3.3
class AlbumSchema(Schema):
    title = fields.Str()
    artist = fields.Nested(lambda: ArtistSchema(only=("name",)))


class ArtistSchema(Schema):
    name = fields.Str()
    albums = fields.List(fields.Nested(AlbumSchema))

Deprecations:

• Passing the string "self" to fields.Nested is deprecated. Use a callable instead.

from marshmallow import Schema, fields

# <3.3
class PersonSchema(Schema):
    partner = fields.Nested("self", exclude=("partner",))
    friends = fields.List(fields.Nested("self"))


# >=3.3
class PersonSchema(Schema):
    partner = fields.Nested(lambda: PersonSchema(exclude=("partner")))
    friends = fields.List(fields.Nested(lambda: PersonSchema()))

Other changes:

... (truncated)

Commits

• 610fe7a Bump version and update changelog
• bac2a40 Update mypy in pre-commit
• ed199ac Make Number._format_num return typing.Any (#1466)
• 47d5e52 Mypy strictness (#1467)
• 31b784f Allow passing lambda functions to Nested (#1382)
• e06e9ca Bump sphinx from 2.2.1 to 2.2.2
• 434df04 Merge pull request #1461 from marshmallow-code/dependabot/pip/mypy-0.750
• 2ea86e6 Bump mypy from 0.740 to 0.750
• 271956b Merge pull request #1444 from marshmallow-code/remove_duplicate_code
• 618521a Fix role
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #104.