Bump apispec from 3.3.2 to 4.0.0

Bumps [apispec](https://github.com/marshmallow-code/apispec) from 3.3.2 to 4.0.0.
- [Release notes](https://github.com/marshmallow-code/apispec/releases)
- [Changelog](https://github.com/marshmallow-code/apispec/blob/dev/CHANGELOG.rst)
- [Commits](marshmallow-code/apispec@3.3.2...4.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

poetry.lock

@@ -16,7 +16,7 @@ python = "^3.6"
 Flask = "^1.1.1"
 marshmallow = "^3.4.0"
 webargs = "^6.0.0"
-apispec = "^3.2.0"
+apispec = ">=3.2,<5.0"
 flask-cors = "^3.0.8"
 zeroconf = ">=0.24.5,<0.29.0"
 apispec_webframeworks = "^0.5.2"