Update pinned development dependencies

Author: Pietro Albini

requirements-build.txt

@@ -4,6 +4,6 @@
 #
 #    pip-compile requirements-build.in
 #
-Babel==2.2.0
-pytz==2016.3              # via babel
+babel==2.3.4
+pytz==2016.4              # via babel
 wheel==0.29.0

requirements-docs.txt

@@ -4,18 +4,18 @@
 #
 #    pip-compile requirements-docs.in
 #
-alabaster==0.7.7          # via sphinx
-babel==2.2.0              # via sphinx
+alabaster==0.7.8          # via sphinx
+babel==2.3.4              # via sphinx
 buildthedocs==1.0.3
 click==6.6                # via buildthedocs
 docutils==0.12            # via sphinx
-imagesize==0.7.0          # via sphinx
+imagesize==0.7.1          # via sphinx
 jinja2==2.8               # via buildthedocs, sphinx
-MarkupSafe==0.23          # via jinja2
+markupsafe==0.23          # via jinja2
 pietroalbini-sphinx-themes==1.3.1
-Pygments==2.1.3           # via sphinx
-pytz==2016.3              # via babel
+pygments==2.1.3           # via sphinx
+pytz==2016.4              # via babel
 pyyaml==3.11              # via buildthedocs
 six==1.10.0               # via sphinx
 snowballstemmer==1.2.1    # via sphinx
-sphinx==1.4               # via buildthedocs, pietroalbini-sphinx-themes
+sphinx==1.4.3             # via buildthedocs, pietroalbini-sphinx-themes

requirements-test.txt

@@ -6,7 +6,7 @@
 #
 cookies==2.2.1            # via responses
 py==1.4.31                # via pytest
-pytest==2.9.1
-requests==2.9.1           # via responses
+pytest==2.9.2
+requests==2.10.0          # via responses
 responses==0.5.1
 six==1.10.0               # via responses

requirements-tools.txt

@@ -6,5 +6,5 @@
 #
 click==6.6                # via pip-tools
 first==2.0.1              # via pip-tools
-pip-tools==1.6
+pip-tools==1.6.5
 six==1.10.0               # via pip-tools