Update pytest-xdist to 1.20.0 (#6194)

* Update pytest-xdist from 1.19.1 to 1.20.0

* Update pytest-xdist from 1.19.1 to 1.20.0

requirements/dev.txt

@@ -46,8 +46,8 @@ pytest-cache==1.0 \
 pytest-django==3.1.2 \
     --hash=sha256:038ccc5a9daa1b1b0eb739ab7dce54e495811eca5ea3af4815a2a3ac45152309 \
     --hash=sha256:00995c2999b884a38ae9cd30a8c00ed32b3d38c1041250ea84caf18085589662
-pytest-xdist==1.19.1 \
-    --hash=sha256:237a0c30056d539de723a1461cf2817c04a9abc90ee1fe51ddfaecc643ef3022
+pytest-xdist==1.20.0 \
+    --hash=sha256:7924d45c2430191fe3679a58116c74ceea13307d7822c169d65fd59a24b3a4fe
 pytest-forked==0.2 \
     --hash=sha256:f275cb48a73fc61a6710726348e1da6d68a978f0ec0c54ece5a5fae5977e5a08
 freezegun==0.3.9 \

tests/ui/requirements.txt

@@ -5,5 +5,5 @@ pytest==3.2.1
 pytest-instafail==0.3.0
 pytest-selenium==1.11.0
 pytest-variables==1.7.0
-pytest-xdist==1.19.1
+pytest-xdist==1.20.0
 selenium==3.5.0