Update dev requirements

Author: davidfritzsche

requirements.txt

@@ -10,58 +10,58 @@ binaryornot==0.4.4        # via reuse
 black==19.10b0            # via -r requirements.in, flake8-black
 boolean.py==3.7           # via license-expression, reuse
 bump2version==1.0.0       # via -r requirements.in
-certifi==2019.11.28       # via requests
+certifi==2020.4.5.1       # via requests
 chardet==3.0.4            # via binaryornot, python-debian, requests
 click==7.1.1              # via black, pip-tools
-coverage[toml]==5.0.4     # via -r requirements.in, pytest-cov
+coverage[toml]==5.1       # via -r requirements.in, pytest-cov
 dflit-core==2.2.0.1       # via dflit
 dflit==2.2.0.1            # via -r requirements.in
 distlib==0.3.0            # via virtualenv
 docutils==0.16            # via dflit
 entrypoints==0.3          # via flake8
 filelock==3.0.12          # via tox, virtualenv
 flake8-black==0.1.1       # via -r requirements.in
-flake8-isort==2.9.1       # via -r requirements.in
+flake8-isort==3.0.0       # via -r requirements.in
 flake8==3.7.9             # via flake8-black, flake8-isort
 fsfe-reuse==1.0.0         # via -r requirements.in
 idna==2.9                 # via requests
 invoke==1.4.1             # via -r requirements.in
 isort[pyproject]==4.3.21  # via flake8-isort
-jinja2==2.11.1            # via reuse
+jinja2==2.11.2            # via reuse
 license-expression==1.2   # via reuse
 markupsafe==1.1.1         # via jinja2
 mccabe==0.6.1             # via flake8
 more-itertools==8.2.0     # via pytest
 mypy-extensions==0.4.3    # via mypy
 mypy==0.770               # via -r requirements.in
 packaging==20.3           # via pytest, tox
-pathspec==0.7.0           # via black
-pip-tools==4.5.1          # via -r requirements.in
+pathspec==0.8.0           # via black
+pip-tools==5.0.0          # via -r requirements.in
 pluggy==0.13.1            # via pytest, tox
 py==1.8.1                 # via pytest, tox
 pycodestyle==2.5.0        # via flake8
 pyflakes==2.1.1           # via flake8
-pyparsing==2.4.6          # via packaging
+pyparsing==2.4.7          # via packaging
 pytest-cov==2.8.1         # via -r requirements.in
 pytest-html==2.1.1        # via -r requirements.in
 pytest-metadata==1.8.0    # via pytest-html
 pytest==5.4.1             # via -r requirements.in, pytest-cov, pytest-html, pytest-metadata
-python-debian==0.1.36     # via reuse
+python-debian==0.1.37     # via reuse
 pytoml==0.1.21            # via dflit, dflit-core
-regex==2020.2.20          # via black
+regex==2020.4.4           # via black
 requests==2.23.0          # via dflit, reuse
-reuse==0.8.1              # via fsfe-reuse
+reuse==0.9.0              # via fsfe-reuse
 six==1.14.0               # via packaging, pip-tools, python-debian, tox, virtualenv
-testfixtures==6.14.0      # via flake8-isort
+testfixtures==6.14.1      # via flake8-isort
 toml==0.10.0              # via black, coverage, isort, tox
 tox-pyenv==1.1.0          # via -r requirements.in
 tox==3.14.6               # via -r requirements.in, tox-pyenv
 typed-ast==1.4.1          # via black, mypy
-typing-extensions==3.7.4.1  # via mypy
-urllib3==1.25.8           # via requests
-virtualenv==20.0.15       # via tox
+typing-extensions==3.7.4.2  # via mypy
+urllib3==1.25.9           # via requests
+virtualenv==20.0.18       # via tox
 wcwidth==0.1.9            # via pytest
 
 # The following packages are considered to be unsafe in a requirements file:
-pip==20.0.2               # via -r requirements.in
+pip==20.0.2               # via -r requirements.in, pip-tools
 setuptools==46.1.3        # via -r requirements.in

tox.ini

@@ -29,11 +29,11 @@ deps =
     -crequirements.txt
     mypy
     flake8
-    black
+    flake8-isort
+    flake8-black
 commands =
     mypy src tests
     flake8
-    black --check --diff .
 basepython = python3.7
 
 [tox:.package]