Update metadata

MANIFEST.in

-include LICENCE.rst
-recursive-include aleksis/apps/chronos/static *
-recursive-include aleksis/apps/chronos/templates *
-recursive-include aleksis/apps/chronos/migrations *

pyproject.toml

 [tool.poetry]
 name = "AlekSIS-App-Chronos"
-version = "1.0a4dev0"
+version = "2.0a1"
 packages = [
     { include = "aleksis" }
 ]
 readme = "README.rst"
+include = ["CHANGELOG.rst", "LICENCE.rst"]
 
 description = "AlekSIS (School Information System) — App Χρόνος (digital timetables)"
 authors = ["Dominik George <dominik.george@teckids.org>", "Julian Leucker <leuckeju@katharineum.de>", "Frank Poetzsch-Heffter <p-h@katharineum.de>", "Tom Teichler <tom.teichler@teckids.org>", "Jonathan Weth <wethjo@katharineum.de>", "Hangzhi Yu <yuha@katharineum.de>"]
@@ -21,8 +22,9 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.7"
 calendarweek = "^0.4.4"
-AlekSIS = { path = "../../.." }
+#AlekSIS = { path = "../../.." }
+AlekSIS = "2.0a1"
 
 [build-system]
-requires = ["poetry>=0.12"]
+requires = ["poetry>=1.0"]
 build-backend = "poetry.masonry.api"