Bump pytest-xdist from 1.34.0 to 2.1.0 in /requirements

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 1.34.0 to 2.1.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-xdist@v1.34.0...v2.1.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements/tests.txt

@@ -37,9 +37,9 @@ pytest==6.0.2 \
 pytest-django==3.9.0 \
     --hash=sha256:64f99d565dd9497af412fcab2989fe40982c1282d4118ff422b407f3f7275ca5 \
     --hash=sha256:664e5f42242e5e182519388f01b9f25d824a9feb7cd17d8f863c8d776f38baf9
-pytest-xdist==1.34.0 \
-    --hash=sha256:ba5d10729372d65df3ac150872f9df5d2ed004a3b0d499cc0164aafedd8c7b66 \
-    --hash=sha256:340e8e83e2a4c0d861bdd8d05c5d7b7143f6eea0aba902997db15c2a86be04ee
+pytest-xdist==2.1.0 \
+    --hash=sha256:7c629016b3bb006b88ac68e2b31551e7becf173c76b977768848e2bbed594d90 \
+    --hash=sha256:82d938f1a24186520e2d9d3a64ef7d9ac7ecdf1a0659e095d18e596b8cbd0672
 pytest-forked==1.3.0 \
     --hash=sha256:dc4147784048e70ef5d437951728825a131b81714b398d5d52f17c7c144d8815 \
     --hash=sha256:6aa9ac7e00ad1a539c41bec6d21011332de671e938c7637378ec9710204e37ca