Fix #249: Quoting format is integer, not string.

requirements-jupyter.txt

@@ -4,14 +4,14 @@ bleach==2.1.2
 decorator==4.2.1
 entrypoints==0.2.3
 html5lib==1.0.1
-ipykernel==4.7.0
+ipykernel==4.8.0
 ipython-genutils==0.2.0
 ipython==6.2.1
 ipywidgets==6.0.1
 jedi==0.11.1
 jinja2==2.10
 jsonschema==2.6.0
-jupyter-client==5.2.1
+jupyter-client==5.2.2
 jupyter-console==5.2.0
 jupyter-core==4.4.0
 jupyter==1.0.0
@@ -19,7 +19,7 @@ markupsafe==1.0
 mistune==0.8.3
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.2.2
+notebook==5.4.0
 pandocfilters==1.4.2
 parso==0.1.1
 pexpect==4.3.1
@@ -28,8 +28,9 @@ prompt-toolkit==1.0.15
 ptyprocess==0.5.2
 pygments==2.2.0
 python-dateutil==2.6.1
-pyzmq==16.0.3
+pyzmq==16.0.4
 qtconsole==4.3.1
+send2trash==1.4.2
 simplegeneric==0.8.1
 six==1.11.0
 terminado==0.8.1