Raise version and fix linting issues

meta/aleksis-builddeps/pyproject.toml

 [tool.poetry]
 name = "AlekSIS-Builddeps"
-version = "2021.12.post0"
+version = "2021.12.1.dev0"
 packages = []
 
 description = "AlekSIS (School Information System) — Build/Dev dependencies for apps"
@@ -32,12 +32,12 @@ flake8 = "^4.0.0"
 flake8-django = "^1.0.0"
 flake8-fixme = "^1.1.1"
 flake8-mypy = "^17.8.0"
-flake8-bandit = "^2.1.2"
+flake8-bandit = "^3.0.0"
 flake8-builtins = "^1.4.1"
 flake8-docstrings = "^1.5.0"
 flake8-rst-docstrings = "^0.2.0"
 black = ">=21.0"
-flake8-black = "^0.2.4"
+flake8-black = "^0.3.0"
 isort = "^5.0.0"
 flake8-isort = "^4.0.0"
 pytest-cov = "^3.0.0"

meta/aleksis/pyproject.toml

 [tool.poetry]
 name = "AlekSIS"
-version = "2021.12.post0"
+version = "2021.12.1.dev0"
 packages = [ { include = "aleksis_meta" } ]
 include = ["LICNECE.rst"]
 readme = "README.rst"