use pip-compile to pin dev requirements

requirements/dev.in

@@ -0,0 +1,5 @@
+-r docs.in
+-r tests.in
+pip-tools
+pre-commit
+tox

requirements/dev.txt

@@ -0,0 +1,59 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile requirements/dev.in
+#
+alabaster==0.7.12         # via sphinx
+appdirs==1.4.4            # via virtualenv
+attrs==19.3.0             # via pytest
+babel==2.8.0              # via sphinx
+blinker==1.4              # via -r requirements/tests.in
+certifi==2020.4.5.1       # via requests
+cfgv==3.1.0               # via pre-commit
+chardet==3.0.4            # via requests
+click==7.1.2              # via pip-tools
+distlib==0.3.0            # via virtualenv
+docutils==0.16            # via sphinx
+filelock==3.0.12          # via tox, virtualenv
+greenlet==0.4.15          # via -r requirements/tests.in
+identify==1.4.16          # via pre-commit
+idna==2.9                 # via requests
+imagesize==1.2.0          # via sphinx
+jinja2==2.11.2            # via sphinx
+markupsafe==1.1.1         # via jinja2
+more-itertools==8.3.0     # via pytest
+nodeenv==1.3.5            # via pre-commit
+packaging==20.4           # via -r requirements/docs.in, pallets-sphinx-themes, pytest, sphinx, tox
+pallets-sphinx-themes==1.2.3  # via -r requirements/docs.in
+pip-tools==5.1.2          # via -r requirements/dev.in
+pluggy==0.13.1            # via pytest, tox
+pre-commit==2.4.0         # via -r requirements/dev.in
+py==1.8.1                 # via pytest, tox
+pygments==2.6.1           # via sphinx
+pyparsing==2.4.7          # via packaging
+pytest==5.4.2             # via -r requirements/tests.in
+python-dotenv==0.13.0     # via -r requirements/tests.in
+pytz==2020.1              # via babel
+pyyaml==5.3.1             # via pre-commit
+requests==2.23.0          # via sphinx
+six==1.15.0               # via packaging, pip-tools, tox, virtualenv
+snowballstemmer==2.0.0    # via sphinx
+sphinx-issues==1.2.0      # via -r requirements/docs.in
+sphinx==3.0.3             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinxcontrib-log-cabinet
+sphinxcontrib-applehelp==1.0.2  # via sphinx
+sphinxcontrib-devhelp==1.0.2  # via sphinx
+sphinxcontrib-htmlhelp==1.0.3  # via sphinx
+sphinxcontrib-jsmath==1.0.1  # via sphinx
+sphinxcontrib-log-cabinet==1.0.1  # via -r requirements/docs.in
+sphinxcontrib-qthelp==1.0.3  # via sphinx
+sphinxcontrib-serializinghtml==1.1.4  # via sphinx
+toml==0.10.1              # via pre-commit, tox
+tox==3.15.1               # via -r requirements/dev.in
+urllib3==1.25.9           # via requests
+virtualenv==20.0.21       # via pre-commit, tox
+wcwidth==0.1.9            # via pytest
+
+# The following packages are considered to be unsafe in a requirements file:
+# pip
+# setuptools

requirements/docs.in

@@ -0,0 +1,5 @@
+Pallets-Sphinx-Themes
+packaging
+Sphinx
+sphinx-issues
+sphinxcontrib-log-cabinet

requirements/docs.txt

@@ -0,0 +1,36 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile requirements/docs.in
+#
+alabaster==0.7.12         # via sphinx
+babel==2.8.0              # via sphinx
+certifi==2020.4.5.1       # via requests
+chardet==3.0.4            # via requests
+docutils==0.16            # via sphinx
+idna==2.9                 # via requests
+imagesize==1.2.0          # via sphinx
+jinja2==2.11.2            # via sphinx
+markupsafe==1.1.1         # via jinja2
+packaging==20.4           # via -r requirements/docs.in, pallets-sphinx-themes, sphinx
+pallets-sphinx-themes==1.2.3  # via -r requirements/docs.in
+pygments==2.6.1           # via sphinx
+pyparsing==2.4.7          # via packaging
+pytz==2020.1              # via babel
+requests==2.23.0          # via sphinx
+six==1.15.0               # via packaging
+snowballstemmer==2.0.0    # via sphinx
+sphinx-issues==1.2.0      # via -r requirements/docs.in
+sphinx==3.0.3             # via -r requirements/docs.in, pallets-sphinx-themes, sphinx-issues, sphinxcontrib-log-cabinet
+sphinxcontrib-applehelp==1.0.2  # via sphinx
+sphinxcontrib-devhelp==1.0.2  # via sphinx
+sphinxcontrib-htmlhelp==1.0.3  # via sphinx
+sphinxcontrib-jsmath==1.0.1  # via sphinx
+sphinxcontrib-log-cabinet==1.0.1  # via -r requirements/docs.in
+sphinxcontrib-qthelp==1.0.3  # via sphinx
+sphinxcontrib-serializinghtml==1.1.4  # via sphinx
+urllib3==1.25.9           # via requests
+
+# The following packages are considered to be unsafe in a requirements file:
+# setuptools

requirements/tests.in

@@ -0,0 +1,4 @@
+pytest
+blinker
+greenlet
+python-dotenv

requirements/tests.txt

@@ -0,0 +1,18 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile requirements/tests.in
+#
+attrs==19.3.0             # via pytest
+blinker==1.4              # via -r requirements/tests.in
+greenlet==0.4.15          # via -r requirements/tests.in
+more-itertools==8.3.0     # via pytest
+packaging==20.4           # via pytest
+pluggy==0.13.1            # via pytest
+py==1.8.1                 # via pytest
+pyparsing==2.4.7          # via packaging
+pytest==5.4.2             # via -r requirements/tests.in
+python-dotenv==0.13.0     # via -r requirements/tests.in
+six==1.15.0               # via packaging
+wcwidth==0.1.9            # via pytest