Bump marshmallow from 2.18.1 to 3.0.1

[dependabot-preview]

Bumps marshmallow from 2.18.1 to 3.0.1.

Changelog

Sourced from marshmallow's changelog.

3.0.1 (2019-08-21)

Bug fixes:

• Fix bug when nesting fields.DateTime within fields.List or fields.Tuple (1357). This bug was introduced in 3.0.0rc9. Thanks zblz for reporting.

3.0.0 (2019-08-18)

Features:

• Optimize List(Nested(...)) (779).
• Minor performance improvements and cleanup (1328).
• Add Schema.from_dict (1312).

Deprecations/Removals:

• Field.fail is deprecated. Use Field.make_error instead.
• Remove UUID validation from fields.UUID, for consistency with other fields (1132).

Support:

• Various docs improvements (1329).

3.0.0rc9 (2019-07-31)

Features:

• Backwards-incompatible: Validation does not occur on serialization (1132). This significantly improves serialization performance.
• Backwards-incompatible: DateTime does not affect timezone information on serialization and deserialization (1234, 1287).
• Add NaiveDateTime and AwareDateTime to enforce timezone awareness (1234, 1287).
• Backwards-incompatible: List does not wrap single values in a list on serialization (1307).
• Backwards-incompatible: Schema.handle_error receives many and partial as keyword arguments (1321).
• Use raise from more uniformly to improve stack traces (1313).
• Rename Nested.__schema to Nested._schema to prevent name mangling (1289).
• Performance improvements (1309).

Deprecations/Removals:

• LocalDateTime is removed (1234).
• marshmallow.utils.utc is removed. Use datetime.timezone.utc instead.

Bug fixes:

• Fix behavior of List(Nested("self")) (#779 (comment)).

Support:

... (truncated)

Commits

• ef35341 Bump version and update changelog
• f7e8062 Nested DateTime Format (#1359)
• b40a0f4 Merge branch '2.x-line' into dev
• 0549bd4 Bump version and update changelog
• ac89039 Merge pull request #1354 from nicktimko/patch-1
• fb4258d Add @​asottile
• 59e1ac8 Avoid DeprecationWarning about ABC in Python 3.x
• e016374 Bump sphinx from 2.1.2 to 2.2.0
• ecc566d Merge pull request #1351 from asottile/upgrade_hooks
• 2f3ebe9 pre-commit autoupdate && pre-commit run --all-files
• Additional commits viewable in compare view

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Superseded by #82.