Pin flake8 to version 3 to prevent StringIO error see tholo/pytest-fl…

…ake8#81

requirements.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.8
 # To update, run:
 #
 #    pip-compile --output-file=requirements.txt requirements.in
@@ -12,29 +12,29 @@ datapunt-data-ingress==2.2.0
     # via -r requirements.in
 defusedxml==0.7.1
     # via djangorestframework-xml
-django-extensions==3.1.3
-    # via -r requirements.in
-django-prometheus==2.1.0
-    # via -r requirements.in
-django-sentry-400-middleware==0.3.0
-    # via -r requirements.in
 django==3.2.8
     # via
     #   -r requirements.in
     #   datapunt-data-ingress
     #   django-extensions
     #   django-sentry-400-middleware
     #   djangorestframework
-djangorestframework-csv==2.1.1
-    # via drf-amsterdam
-djangorestframework-xml==2.0.0
-    # via drf-amsterdam
+django-extensions==3.1.3
+    # via -r requirements.in
+django-prometheus==2.1.0
+    # via -r requirements.in
+django-sentry-400-middleware==0.3.0
+    # via -r requirements.in
 djangorestframework==3.12.4
     # via
     #   datapunt-data-ingress
     #   djangorestframework-csv
     #   drf-amsterdam
     #   drf-extensions
+djangorestframework-csv==2.1.1
+    # via drf-amsterdam
+djangorestframework-xml==2.0.0
+    # via drf-amsterdam
 drf-amsterdam==0.4.1
     # via -r requirements.in
 drf-extensions==0.7.1

requirements_dev.in

@@ -18,5 +18,6 @@ pytest
 pytest-cov
 pytest-django
 pytest-black
+flake8<4  # see https://github.com/tholo/pytest-flake8/issues/81
 pytest-flake8
 pytest-isort

requirements_dev.txt

@@ -1,5 +1,5 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.8
 # To update, run:
 #
 #    pip-compile --output-file=requirements_dev.txt requirements_dev.in
@@ -34,19 +34,26 @@ defusedxml==0.7.1
     # via
     #   -r ./requirements.txt
     #   djangorestframework-xml
+django==3.2.8
+    # via
+    #   -r ./requirements.txt
+    #   datapunt-data-ingress
+    #   django-extensions
+    #   django-sentry-400-middleware
+    #   djangorestframework
 django-extensions==3.1.3
     # via -r ./requirements.txt
 django-prometheus==2.1.0
     # via -r ./requirements.txt
 django-sentry-400-middleware==0.3.0
     # via -r ./requirements.txt
-django==3.2.8
+djangorestframework==3.12.4
     # via
     #   -r ./requirements.txt
     #   datapunt-data-ingress
-    #   django-extensions
-    #   django-sentry-400-middleware
-    #   djangorestframework
+    #   djangorestframework-csv
+    #   drf-amsterdam
+    #   drf-extensions
 djangorestframework-csv==2.1.1
     # via
     #   -r ./requirements.txt
@@ -55,21 +62,16 @@ djangorestframework-xml==2.0.0
     # via
     #   -r ./requirements.txt
     #   drf-amsterdam
-djangorestframework==3.12.4
-    # via
-    #   -r ./requirements.txt
-    #   datapunt-data-ingress
-    #   djangorestframework-csv
-    #   drf-amsterdam
-    #   drf-extensions
 drf-amsterdam==0.4.1
     # via -r ./requirements.txt
 drf-extensions==0.7.1
     # via
     #   -r ./requirements.txt
     #   drf-amsterdam
-flake8==4.0.1
-    # via pytest-flake8
+flake8==3.9.2
+    # via
+    #   -r requirements_dev.in
+    #   pytest-flake8
 iniconfig==1.1.1
     # via pytest
 ipdb==0.13.9
@@ -96,7 +98,7 @@ parso==0.8.2
     # via jedi
 pathspec==0.9.0
     # via black
-pep517==0.11.1
+pep517==0.12.0
     # via pip-tools
 pexpect==4.8.0
     # via ipython
@@ -120,16 +122,23 @@ ptyprocess==0.7.0
     # via pexpect
 py==1.10.0
     # via pytest
-pycodestyle==2.8.0
+pycodestyle==2.7.0
     # via flake8
-pyflakes==2.4.0
+pyflakes==2.3.1
     # via flake8
 pygments==2.10.0
     # via ipython
 pyhumps==3.0.2
     # via -r ./requirements.txt
 pyparsing==2.4.7
     # via packaging
+pytest==6.2.5
+    # via
+    #   -r requirements_dev.in
+    #   pytest-black
+    #   pytest-cov
+    #   pytest-django
+    #   pytest-flake8
 pytest-black==0.3.12
     # via -r requirements_dev.in
 pytest-cov==3.0.0
@@ -140,13 +149,6 @@ pytest-flake8==1.0.7
     # via -r requirements_dev.in
 pytest-isort==2.0.0
     # via -r requirements_dev.in
-pytest==6.2.5
-    # via
-    #   -r requirements_dev.in
-    #   pytest-black
-    #   pytest-cov
-    #   pytest-django
-    #   pytest-flake8
 python-dateutil==2.8.2
     # via -r ./requirements.txt
 pytz==2021.3