Bump numpy from 1.15.4 to 1.22.0

Bumps [numpy](https://github.com/numpy/numpy) from 1.15.4 to 1.22.0.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/HOWTO_RELEASE.rst)
- [Commits](https://github.com/numpy/numpy/compare/v1.15.4...v1.22.0)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
...

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

setup.py

@@ -22,7 +22,7 @@ setup(
     description='Liquid-liquid extraction parameter searcher',
     install_requires=['cantera==2.4.0',
                       'pandas==1.0.3',
-                      'numpy==1.15.4',
+                      'numpy==1.22.0',
                       'scipy==1.4.1',
                       'matplotlib==3.1.3']
 )