Update Python dependencies

Author: mdmintz

requirements.txt

@@ -58,7 +58,7 @@ pygments==2.7.4;python_version>="3.5"
 traitlets==4.3.3;python_version<"3.7"
 traitlets==5.0.5;python_version>="3.7"
 prompt-toolkit==1.0.18;python_version<"3.6"
-prompt-toolkit==3.0.15;python_version>="3.6"
+prompt-toolkit==3.0.16;python_version>="3.6"
 ipython==5.10.0;python_version<"3.5"
 ipython==6.5.0;python_version>="3.5" and python_version<"3.6"
 ipython==7.16.1;python_version>="3.6" and python_version<"3.7"
@@ -73,7 +73,7 @@ coverage==5.4
 brython==3.9.1
 pyotp==2.6.0
 boto==2.49.0
-cffi==1.14.4
+cffi==1.14.5
 toml==0.10.2
 Pillow==6.2.2;python_version<"3.5"
 Pillow==7.2.0;python_version>="3.5" and python_version<"3.6"

setup.py

@@ -162,7 +162,7 @@
         'traitlets==4.3.3;python_version<"3.7"',
         'traitlets==5.0.5;python_version>="3.7"',
         'prompt-toolkit==1.0.18;python_version<"3.6"',
-        'prompt-toolkit==3.0.15;python_version>="3.6"',
+        'prompt-toolkit==3.0.16;python_version>="3.6"',
         'ipython==5.10.0;python_version<"3.5"',
         'ipython==6.5.0;python_version>="3.5" and python_version<"3.6"',
         'ipython==7.16.1;python_version>="3.6" and python_version<"3.7"',
@@ -177,7 +177,7 @@
         'brython==3.9.1',
         'pyotp==2.6.0',
         'boto==2.49.0',
-        'cffi==1.14.4',
+        'cffi==1.14.5',
         'toml==0.10.2',
         'Pillow==6.2.2;python_version<"3.5"',
         'Pillow==7.2.0;python_version>="3.5" and python_version<"3.6"',