Update psutil to 5.6.7

Author: maxgerhardt

requirements.txt

@@ -21,7 +21,7 @@ hidapi>=0.7.99,<0.8.0;platform_system!="Linux"
 cmsis-pack-manager>=0.2.3,<0.3.0
 pywin32>=301;platform_system=='Windows'
 wmi==1.4.9;platform_system=='Windows'
-psutil==5.6.6
+psutil==5.6.7
 cryptography>=3.2,<4
 Click>=7.0,<8
 cbor>=1.0.0