Update requirements files with newer pip-tools

Because of how pip-tools handles formatting, this looks like a
major change but is actually just "moving comments around".

dev-requirements.txt

@@ -1,53 +1,116 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with python 3.6
 # To update, run:
 #
 #    pip-compile dev-requirements.in
 #
-appdirs==1.4.3            # via black
-aspy.yaml==1.3.0          # via pre-commit
-astroid==2.2.5            # via pylint
-attrs==19.1.0             # via black
-backcall==0.1.0           # via ipython
+appdirs==1.4.3
+    # via black
+aspy.yaml==1.3.0
+    # via pre-commit
+astroid==2.2.5
+    # via pylint
+attrs==19.1.0
+    # via black
+backcall==0.1.0
+    # via ipython
 black==19.3b0
-cfgv==2.0.0               # via pre-commit
-click==7.0                # via black, pip-tools
-decorator==4.4.0          # via ipython, traitlets
-entrypoints==0.3          # via flake8
-flake8-quotes==2.0.1
+    # via -r dev-requirements.in
+cfgv==2.0.0
+    # via pre-commit
+click==7.0
+    # via
+    #   black
+    #   pip-tools
+decorator==4.4.0
+    # via
+    #   ipython
+    #   traitlets
+entrypoints==0.3
+    # via flake8
 flake8==3.7.7
-identify==1.4.4           # via pre-commit
-importlib-metadata==0.17  # via pre-commit
-importlib-resources==1.0.2  # via pre-commit
-ipython-genutils==0.2.0   # via traitlets
+    # via
+    #   -r dev-requirements.in
+    #   flake8-quotes
+flake8-quotes==2.0.1
+    # via -r dev-requirements.in
+identify==1.4.4
+    # via pre-commit
+importlib-metadata==0.17
+    # via pre-commit
+importlib-resources==1.0.2
+    # via pre-commit
 ipython==7.5.0
-isort==4.3.20             # via pylint
-jedi==0.13.3              # via ipython
-lazy-object-proxy==1.4.1  # via astroid
-mccabe==0.6.1             # via flake8, pylint
-nodeenv==1.3.3            # via pre-commit
-parso==0.4.0              # via jedi
-pexpect==4.7.0            # via ipython
-pickleshare==0.7.5        # via ipython
+    # via -r dev-requirements.in
+ipython-genutils==0.2.0
+    # via traitlets
+isort==4.3.20
+    # via pylint
+jedi==0.13.3
+    # via ipython
+lazy-object-proxy==1.4.1
+    # via astroid
+mccabe==0.6.1
+    # via
+    #   flake8
+    #   pylint
+nodeenv==1.3.3
+    # via pre-commit
+parso==0.4.0
+    # via jedi
+pexpect==4.7.0
+    # via ipython
+pickleshare==0.7.5
+    # via ipython
 pip-tools==3.8.0
+    # via -r dev-requirements.in
 pre-commit==1.17.0
-prompt-toolkit==2.0.9     # via ipython
-ptyprocess==0.6.0         # via pexpect
-pycodestyle==2.5.0        # via flake8
+    # via -r dev-requirements.in
+prompt-toolkit==2.0.9
+    # via ipython
+ptyprocess==0.6.0
+    # via pexpect
+pycodestyle==2.5.0
+    # via flake8
 pydocstyle==3.0.0
-pyflakes==2.1.1           # via flake8
-pygments==2.4.2           # via ipython
+    # via -r dev-requirements.in
+pyflakes==2.1.1
+    # via flake8
+pygments==2.4.2
+    # via ipython
 pylint==2.3.1
-pyyaml==5.1.1             # via aspy.yaml, pre-commit
-six==1.12.0               # via astroid, cfgv, pip-tools, pre-commit, prompt-toolkit, pydocstyle, traitlets
-snowballstemmer==1.2.1    # via pydocstyle
-toml==0.10.0              # via black, pre-commit
-traitlets==4.3.2          # via ipython
-typed-ast==1.4.0          # via astroid
-virtualenv==16.6.0        # via pre-commit
-wcwidth==0.1.7            # via prompt-toolkit
-wrapt==1.11.1             # via astroid
-zipp==0.5.1               # via importlib-metadata
+    # via -r dev-requirements.in
+pyyaml==5.1.1
+    # via
+    #   aspy.yaml
+    #   pre-commit
+six==1.12.0
+    # via
+    #   astroid
+    #   cfgv
+    #   pip-tools
+    #   pre-commit
+    #   prompt-toolkit
+    #   pydocstyle
+    #   traitlets
+snowballstemmer==1.2.1
+    # via pydocstyle
+toml==0.10.0
+    # via
+    #   black
+    #   pre-commit
+traitlets==4.3.2
+    # via ipython
+typed-ast==1.4.0
+    # via astroid
+virtualenv==16.6.0
+    # via pre-commit
+wcwidth==0.1.7
+    # via prompt-toolkit
+wrapt==1.11.1
+    # via astroid
+zipp==0.5.1
+    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
-# setuptools==41.0.1        # via ipython
+# setuptools