chore(deps): update dependency dev/types-certifi to v2021 (#933)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [dev/types-certifi](https://togithub.com/python/typeshed)
([changelog](https://togithub.com/typeshed-internal/stub_uploader/blob/main/data/changelogs/certifi.md))
| `<2021.0.0,>=2020.0.0` -> `<2021.10.9,>=2020.0.0` |
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pdm.lock

@@ -93,7 +93,7 @@ dev = [
     "pytest-cov",
     "python-multipart",
     "types-PyYAML<7.0.0,>=6.0.3",
-    "types-certifi<2021.0.0,>=2020.0.0",
+    "types-certifi<2021.10.9,>=2020.0.0",
     "types-python-dateutil<3.0.0,>=2.0.0",
 ]