Update requirements file

requirements.txt

@@ -1,6 +1,8 @@
 -i https://pypi.org/simple
 -e .
 alabaster==0.7.12
+apipkg==1.5
+argopt==0.5.0
 arpeggio==1.9.0
 atomicwrites==1.3.0
 attrs==19.1.0
@@ -12,18 +14,20 @@ chardet==3.0.4
 click==7.0
 coverage==4.5.3
 decorator==4.4.0
-defusedxml==0.5.0
+defusedxml==0.6.0
 docutils==0.14
 entrypoints==0.3
+execnet==1.6.0
 filelock==3.0.10
 flake8==3.7.7
+git-fame==1.8.0
 idna==2.8
 imagesize==1.1.0
 incremental==17.5.0
 invoke==1.2.0
 ipykernel==5.1.0
 ipython-genutils==0.2.0
-ipython==7.4.0 ; python_version >= '3.3'
+ipython==7.5.0 ; python_version >= '3.3'
 ipywidgets==7.4.2
 jedi==0.13.3
 jinja2==2.10.1
@@ -36,7 +40,7 @@ markupsafe==1.1.1
 mccabe==0.6.1
 mistune==0.8.4
 more-itertools==7.0.0 ; python_version > '2.7'
-nbconvert==5.4.1
+nbconvert==5.5.0
 nbformat==4.4.0
 nbsphinx==0.4.2
 notebook==5.7.8
@@ -57,12 +61,15 @@ py==1.8.0
 pycodestyle==2.5.0
 pyflakes==2.1.1
 pygments==2.3.1
-pyparsing==2.3.1
-pyrsistent==0.14.11
+pyparsing==2.4.0
+pyrsistent==0.15.1
 pytest-cov==2.6.1
-pytest==4.4.0
+pytest-forked==1.0.2
+pytest-xdist==1.28.0
+pytest==4.4.1
 python-dateutil==2.8.0
-pytz==2018.9
+python-dotenv==0.10.1
+pytz==2019.1
 pyzmq==18.0.1
 qtconsole==4.4.3
 readme-renderer==24.0
@@ -72,26 +79,28 @@ send2trash==1.5.0
 six==1.12.0
 snowballstemmer==1.2.1
 sphinx-rtd-theme==0.4.3
-sphinx==2.0.0
+sphinx==2.0.1
 sphinxcontrib-applehelp==1.0.1
 sphinxcontrib-devhelp==1.0.1
-sphinxcontrib-htmlhelp==1.0.1
+sphinxcontrib-htmlhelp==1.0.2
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.2
 sphinxcontrib-serializinghtml==1.1.3
+tabulate==0.8.3
 terminado==0.8.2
 testpath==0.4.2
 toml==0.10.0
 tornado==6.0.2
 towncrier==19.2.0
-tox==3.8.6
+tox==3.9.0
 tqdm==4.31.1
 traitlets==4.3.2
 twine==1.13.0
-urllib3==1.24.1
+urllib3==1.24.2
 versioneer==0.18
-virtualenv==16.4.3
+virtualenv==16.5.0
 wcwidth==0.1.7
 webencodings==0.5.1
 wheel==0.33.1
 widgetsnbextension==3.4.2
+xxhash==1.3.0