Update dependencies.

requirements-jupyter.txt

@@ -1,10 +1,10 @@
 -e .[jupyter]
 appnope==0.1.0
-bleach==2.1.1
+bleach==2.1.2
 decorator==4.1.2
 entrypoints==0.2.3
-html5lib==1.0b10
-ipykernel==4.6.1
+html5lib==1.0.1
+ipykernel==4.7.0
 ipython-genutils==0.2.0
 ipython==6.2.1
 ipywidgets==6.0.1
@@ -16,13 +16,13 @@ jupyter-console==5.2.0
 jupyter-core==4.4.0
 jupyter==1.0.0
 markupsafe==1.0
-mistune==0.8.1
+mistune==0.8.3
 nbconvert==5.3.1
 nbformat==4.4.0
 notebook==5.2.2
 pandocfilters==1.4.2
 parso==0.1.0
-pexpect==4.3.0
+pexpect==4.3.1
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
 ptyprocess==0.5.2