feat: Allow django 4.0 & python 3.9

.travis.yml

@@ -5,6 +5,7 @@ python:
   - "3.6"
   - "3.7"
   - "3.8"
+  - "3.9"
 cache:
   pip: true
 install:
@@ -25,5 +26,7 @@ matrix:
       env: DJANGO="master"
     - python: "3.8"
       env: DJANGO="master"
+    - python: "3.9"
+      env: DJANGO="master"
 after_success:
   - codecov

pyproject.toml

@@ -1,5 +1,5 @@
 [tool.black]
-target_version = ['py34', 'py35', 'py36', 'py37', 'py38']
+target_version = ['py34', 'py35', 'py36', 'py37', 'py38', 'py39']
 include = '\.pyi?$'
 exclude = '''
 /(\.git/

setup.py

@@ -10,6 +10,7 @@
     "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
     "Topic :: Internet :: WWW/HTTP",
     "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
@@ -25,7 +26,7 @@
     author_email="[email protected]",
     description="Django fields for the prices module",
     license="BSD",
-    version="2.2.0",
+    version="2.3.0",
     long_description=long_description,
     long_description_content_type="text/markdown",
     url="https://github.com/mirumee/django-prices",
@@ -34,7 +35,7 @@
     classifiers=CLASSIFIERS,
     install_requires=[
         "Babel>=2.2",
-        "Django>=2.2,<4",
+        "Django>=2.2,<5",
         "enmerkar>=0.7.1",
         "prices>=1.0.0",
     ],

tox.ini

@@ -2,13 +2,14 @@
 envlist =
     py{36,37,38}-django22
     py{36,37,38}-django30
+    py{36,37,38}-django40
     py{36,37,38}-django_master
 
 [testenv]
 pip_pre = true
 deps =
     django22: django>=2.2,<2.3
-    django30: django>=3.0,<3.1
+    django30: django>=3.0,<5.0
     pytest
     pytest-cov
     pytest-django
@@ -23,12 +24,14 @@ python =
     3.6: py36
     3.7: py37
     3.8: py38
+    3.9: py39
 unignore_outcomes = True
 
 [travis:env]
 DJANGO =
     2.2: django22
     3.0: django30
+    4.0: django40
     master: django_master
 
 [pytest]