Update pyproject.toml

pyproject.toml

 [tool.poetry]
 name = "django-split-input"
-version = "0.2.2"
+version = "0.2.2.post1"
 description = "A widget to have a django text input split into multiple HTML inputs."
 authors = ["Julian Leucker <leuckerj@gmail.com>"]
 readme = "README.md"
@@ -8,17 +8,22 @@ repository = "https://edugit.org/AlekSIS/libs/django-split-input"
 keywords = ["django", "widget"]
 classifiers = [
     "Environment :: Web Environment",
+    "Framework :: Django :: 2",
+    "Framework :: Django :: 2.1",
+    "Framework :: Django :: 2.2",
+    "Framework :: Django :: 3",
     "Framework :: Django :: 3.1",
     "Intended Audience :: Developers",
     "Topic :: Internet :: WWW/HTTP :: WSGI :: Application",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
     "Typing :: Typed",
 ]
+license = "Apache-2.0"
 
 
 [tool.poetry.dependencies]
 python = "^3.7"
-Django = "^3.1"
+Django = ">=2.0,<4.0"
 
 [tool.poetry.dev-dependencies]