Disallow aiohttp prereleases

Author: p1c2u

poetry.lock

@@ -63,7 +63,7 @@ python = "^3.8.0"
 django = {version = ">=3.0", optional = true}
 falcon = {version = ">=3.0", optional = true}
 flask = {version = "*", optional = true}
-aiohttp = {version = ">=3.0", allow-prereleases = true, optional = true}
+aiohttp = {version = ">=3.0", optional = true}
 starlette = {version = ">=0.26.1,<0.33.0", optional = true}
 isodate = "*"
 more-itertools = "*"