build(deps): update pydantic requirement from ^1.8 to >=1.8,<3.0

Updates the requirements on [pydantic](https://github.com/pydantic/pydantic) to permit the latest version.
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/main/HISTORY.md)
- [Commits](pydantic/pydantic@v1.8...v2.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -22,7 +22,7 @@ Pint = ">=0.15,<0.22"
 "ruamel.yaml" = {version = ">=0.16.5,<0.18.0", optional = true}
 pygls = {version = "^1.0.0", optional = true}
 Jinja2 = ">=2.11.3,<4.0.0"
-pydantic = "^1.8"
+pydantic = ">=1.8,<3.0"
 click = ">=7.1.2,<9"
 
 [tool.poetry.extras]