Default branches for astroid, django and pylint were renamed from 'master' to 'main'

Author: carlio

tox.ini

@@ -22,7 +22,7 @@ commands =
     flake8: flake8
     pylint: pylint --rcfile=tox.ini -d missing-docstring,too-many-branches,too-many-return-statements,too-many-ancestors,fixme --ignore=tests pylint_django setup
     readme: bash -c "python setup.py -q sdist && twine check dist/*"
-    py{36}-django{111,20,-master}: coverage run pylint_django/tests/test_func.py -v
+    py{36}-django{111,20,-main}: coverage run pylint_django/tests/test_func.py -v
     py{36,37,38,39}-django{22,30,31,32}: coverage run pylint_django/tests/test_func.py -v
     clean: find . -type f -name '*.pyc' -delete
     clean: find . -type d -name __pycache__ -delete
@@ -41,16 +41,16 @@ deps =
     django30: Django>=3.0,<3.1
     django31: Django>=3.1,<3.2
     django32: Django>=3.2,<4.0
-    django-master: Django
-    django-master: git+https://github.com/pycqa/astroid@master
-    django-master: git+https://github.com/pycqa/pylint@master
+    django-main: Django
+    django-main: git+https://github.com/pycqa/astroid@main
+    django-main: git+https://github.com/pycqa/pylint@main
 setenv =
     PIP_DISABLE_PIP_VERSION_CHECK = 1
     PYTHONPATH = .
 allowlist_externals =
     django_not_installed: bash
     readme: bash
-    py{36}-django{111,20,-master}: coverage
+    py{36}-django{111,20,-main}: coverage
     py{36,37,38,39}-django{22,30,31,32}: coverage
     clean: find
     clean: rm
@@ -64,7 +64,7 @@ DJANGO =
     3.0: django30
     3.1: django31
     3.2: django32
-    master: django-master
+    main: django-main
 
 [flake8]
 max-line-length = 140