Update dependency isort to >=5.9.3

setup.py

@@ -43,7 +43,7 @@ def run(self):
     "codecov>=2.1.4",
     "distributed>=2021.4.1",
     "docutils>=0.10,<0.16",
-    "psutil>=5.7.0",
+    "psutil>=5.9.3",
     "pytest>=5.4.3",
     "pytest-cov>=2.9.0",
     "pytest-raises>=0.11",
@@ -63,7 +63,7 @@ def run(self):
     "flake8-debugger>=3.2.1",
     "gitchangelog>=3.0.4",
     "ipython>=7.15.0",
-    "isort>=5.7.0",
+    "isort>=5.9.3",
     "m2r2>=0.2.7",
     "mypy>=0.800",
     "pytest-runner>=5.2",