Dependency fix (#806)

* Update requirements_test.txt

* Update CHANGELOG.md

Author: Jonathan DEKHTIAR

CHANGELOG.md

@@ -139,6 +139,7 @@ To release a new version, please update the changelog as followed:
 - pytest>=3.6,<3.7 => tqdm>=3.6,<3.8 (PR #798)
 - yapf>=0.21,<0.22 => yapf>=0.21,<0.23 (PR #798)
 - tqdm>=4.23,<4.25 => tqdm>=4.23,<4.26 (PR #798)
+- pytest-xdist>=1.22,<1.23 => pytest-xdist>=1.22,<1.24 (PR #805 and #806)
 
 ### Contributors
 

requirements/requirements_test.txt

@@ -4,6 +4,6 @@ pydocstyle>=2.1,<2.2
 pytest>=3.6,<3.8
 pytest-cache>=1.0,<1.1
 pytest-cov>=2.5,<2.6
-pytest-xdist==1.23.0
+pytest-xdist>=1.22,<1.24
 sphinx>=1.7,<1.8
-yapf>=0.21,<0.23
+yapf>=0.21,<0.23