Bump pytest-xdist from 1.28.0 to 1.29.0 (#185)

Bumps [pytest-xdist](https://github.com/pytest-dev/pytest-xdist) from 1.28.0 to 1.29.0.
- [Release notes](https://github.com/pytest-dev/pytest-xdist/releases)
- [Changelog](https://github.com/pytest-dev/pytest-xdist/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-xdist/compare/v1.28.0...v1.29.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -4,7 +4,7 @@ pytest-black==0.3.7 --hash=sha256:75bbeccfe23442a190164c0bf202d7498df25451fa4177
 pytest-docstyle==1.5.0 --hash=sha256:dcc54084b8e8282a83e50c6220c85d1c7d05e3871f74f0e911499b4f3adea756
 pytest-flake8==1.0.4 --hash=sha256:4d225c13e787471502ff94409dcf6f7927049b2ec251c63b764a4b17447b60c0 --hash=sha256:d7e2b6b274a255b7ae35e9224c85294b471a83b76ecb6bd53c337ae977a499af
 pytest-mypy==0.3.2 --hash=sha256:8f6436eed8118afd6c10a82b3b60fb537336736b0fd7a29262a656ac42ce01ac --hash=sha256:acc653210e7d8d5c72845a5248f00fd33f4f3379ca13fe56cfc7b749b5655c3e
-pytest-xdist==1.28.0 --hash=sha256:b0bb4b0293ee8657b9eb3ff334a3b6aac4db74fd4a86b81e1982c879237a47eb --hash=sha256:f83a485293e81fd57c8a5a85a3f12473a532c5ca7dec518857cbb72766bb526c
+pytest-xdist==1.29.0 --hash=sha256:501795cb99e567746f30fe78850533d4cd500c93794128e6ab9988e92a17b1f8 --hash=sha256:3489d91516d7847db5eaecff7a2e623dba68984835dbe6cedb05ae126c4fb17f
 pytest==4.6.3 --hash=sha256:926855726d8ae8371803f7b2e6ec0a69953d9c6311fa7c3b6c1b929ff92d27da --hash=sha256:4a784f1d4f2ef198fe9b7aef793e9fa1a3b2f84e822d9b3a64a181293a572d45
 PyYAML==5.1.1 --hash=sha256:70d9818f1c9cd5c48bb87804f2efc8692f1023dac7f1a1a5c61d454043c1d265 --hash=sha256:a0f329125a926876f647c9fa0ef32801587a12328b4a3c741270464e3e4fa778 --hash=sha256:cd0618c5ba5bda5f4039b9398bb7fb6a317bb8298218c3de25c47c4740e4b95e --hash=sha256:57acc1d8533cbe51f6662a55434f0dbecfa2b9eaf115bede8f6fd00115a0c0d3 --hash=sha256:ceacb9e5f8474dcf45b940578591c7f3d960e82f926c707788a570b51ba59190 --hash=sha256:fe6a88094b64132c4bb3b631412e90032e8cfe9745a58370462240b8cb7553cd --hash=sha256:68c8dd247f29f9a0d09375c9c6b8fdc64b60810ebf07ba4cdd64ceee3a58c7b7 --hash=sha256:588c94b3d16b76cfed8e0be54932e5729cc185caffaa5a451e7ad2f7ed8b4043 --hash=sha256:a3c252ab0fa1bb0d5a3f6449a4826732f3eb6c0270925548cac342bc9b22c225 --hash=sha256:86a93cccd50f8c125286e637328ff4eef108400dd7089b46a7be3445eecfa391 --hash=sha256:b4bb4d3f5e232425e25dda21c070ce05168a786ac9eda43768ab7f3ac2770955
 sqlparse==0.3.0 --hash=sha256:40afe6b8d4b1117e7dff5504d7a8ce07d9a1b15aeeade8a2d10f130a834f8177