Bump joblib from 0.15.1 to 1.2.0 in /BeeHiveOptimization

Bumps [joblib](https://github.com/joblib/joblib) from 0.15.1 to 1.2.0.
- [Release notes](https://github.com/joblib/joblib/releases)
- [Changelog](https://github.com/joblib/joblib/blob/master/CHANGES.rst)
- [Commits](joblib/joblib@0.15.1...1.2.0)

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

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

BeeHiveOptimization/requirements.txt

@@ -1,2 +1,2 @@
 numpy==1.18.4
-joblib==0.15.1
+joblib==1.2.0