Bump mkdocs from 1.3.0 to 1.4.0

[dependabot[bot]]

Bumps mkdocs from 1.3.0 to 1.4.0.

Release notes

Sourced from mkdocs's releases.

1.4.0

Feature upgrades

Hooks (#2978)

The new hooks: config allows you to add plugin-like event handlers from local Python files, without needing to set up and install an actual plugin.

See documentation.

edit_uri flexibility (#2927)

There is a new edit_uri_template: config.
It works like edit_uri but more generally covers ways to construct an edit URL.
See documentation.

Additionally, the edit_uri functionality will now fully work even if repo_url is omitted (#2928)

Upgrades for plugin developers

NOTE: This release has big changes to the implementation of plugins and their configs. But, the intention is to have zero breaking changes in all reasonably common use cases. Or at the very least if a code fix is required, there should always be a way to stay compatible with older MkDocs versions. Please report if this release breaks something.

Customize event order for plugin event handlers (#2973)

Plugins can now choose to set a priority value for their event handlers. This can override the old behavior where for each event type, the handlers are called in the order that their plugins appear in the plugins config.

If this is set, events with higher priority are called first. Events without a chosen priority get a default of 0. Events that have the same priority are ordered as they appear in the config.

Recommended priority values: 100 "first", 50 "early", 0 "default", -50 "late", -100 "last".
As different plugins discover more precise relations to each other, the values should be further tweaked.

See documentation.

New events that persist across builds in mkdocs serve (#2972)

The new events are on_startup and on_shutdown. They run at the very beginning and very end of an mkdocs invocation.
on_startup also receives information on how mkdocs was invoked (e.g. serve --dirtyreload).

See documentation.

Replace File.src_path to not deal with backslashes (#2930)

The property src_path uses backslashes on Windows, which doesn't make sense as it's a virtual path.
To not make a breaking change, there's no change to how this property is used, but now you should:

• Use File.src_uri instead of File.src_path
• and File.dest_uri instead of File.dest_path.

These consistently use forward slashes, and are now the definitive source that MkDocs itself uses.

... (truncated)

Commits

• 927ee26 Release 1.4.0 (#2986)
• 5cce501 Merge pull request #2962 from mkdocs/meta
• 5015fa7 Add examples of class-based schema with ListOfItems
• cc627f7 Prevent wrapping into Optional when the option has a default
• aeffe61 Change config_options.URL's default from '' to None
• 5156947 Add a test for subclassing a config schema
• ff8552a Add tests for new class-based configs
• 6d8c4d1 Preserve a copy of config_options_tests before reworking it
• 452f56c Move config_options_tests.py before reworking it
• cf9d237 Change ListOfItems' "default default" from [] to None
• Additional commits viewable in compare view

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