Bump matplotlib from 3.3.1 to 3.3.2

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.3.1 to 3.3.2.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](matplotlib/matplotlib@v3.3.1...v3.3.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -3,7 +3,7 @@ Django==3.1.1
 gpflow==2.1.0
 python-dateutil==2.8.1
 networkx==2.5
-matplotlib==3.3.1
+matplotlib==3.3.2
 pandas==1.1.2
 matminer==0.6.3
 autologging

setup.py

@@ -44,7 +44,7 @@
                     ],
     install_requires=["python-dateutil==2.8.1",
                       "networkx==2.5",
-                      "matplotlib==3.3.1",
+                      "matplotlib==3.3.2",
                       "qmpy",  # This version is constrained by the source
                       "pandas==1.1.2",
                       "matminer==0.6.3",