Bump matplotlib from 3.3.2 to 3.3.3

Bumps [matplotlib](https://github.com/matplotlib/matplotlib) from 3.3.2 to 3.3.3.
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](https://github.com/matplotlib/matplotlib/compare/v3.3.2...v3.3.3)

requirements.txt

@@ -8,8 +8,8 @@ kiwisolver==1.3.1
 importlib-metadata==3.1.0
 joblib==0.17.0
 llvmlite==0.34.0
+matplotlib==3.3.3
 mlxtend==0.18.0
-matplotlib==3.3.2
 more-itertools==8.6.0
 numba==0.51.2
 numpy==1.19.4

sphinx-doc/requirements_sphinx.txt

@@ -22,7 +22,7 @@ kiwisolver==1.3.1
 llvmlite==0.34.0
 Markdown==3.3.3
 MarkupSafe==1.1.1
-matplotlib==3.3.2
+matplotlib==3.3.3
 mlxtend==0.18.0
 more-itertools==8.6.0
 numba==0.51.2