Bump pluggy from 0.12.0 to 0.13.0 in /requirements (#5493)

Bumps [pluggy](https://github.com/pytest-dev/pluggy) from 0.12.0 to 0.13.0.
- [Release notes](https://github.com/pytest-dev/pluggy/releases)
- [Changelog](https://github.com/pytest-dev/pluggy/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pluggy/compare/0.12.0...0.13.0)

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

requirements/dev.txt

@@ -56,9 +56,9 @@ more-itertools==7.2.0 \
 packaging==19.1 \
     --hash=sha256:630ac83e8f8a9566c4f88038447ed9e16e6f10582767a01f31c769d9a71e \
     --hash=sha256:a7ac867b97fdc07ee80a8058fe4435ccd274ecc3b0ed61d852d7d53055528cf9
-pluggy==0.12.0 \
-    --hash=sha256:b9817417e95936bf75d85d3f8767f7df6cdde751fc40aed3bb3074cbcb77757c \
-    --hash=sha256:0825a152ac059776623854c1543d65a4ad408eb3d33ee114dff91e57ec6ae6fc
+pluggy==0.13.0 \
+    --hash=sha256:0db4b7601aae1d35b4a033282da476845aa19185c1e6964b25cf324b5e4ec3e6 \
+    --hash=sha256:fa5fa1622fa6dd5c030e9cad086fa19ef6a0cf6d7a2d12318e10cb49d6d68f34
 py==1.8.0 \
     --hash=sha256:64f65755aee5b381cea27766a3a147c3f15b9b6b9ac88676de66ba2ae36793fa \
     --hash=sha256:dc639b046a6e2cff5bbe40194ad65936d6ba360b52b3c3fe1d08a82dd50b5e53