Replace Dependabot with Renovate (#73)

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Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

Welcome to [Renovate](https://togithub.com/renovatebot/renovate)! This
is an onboarding PR to help you understand and configure settings before
regular Pull Requests begin.

🚦 To activate Renovate, merge this Pull Request. To disable Renovate,
simply close this Pull Request unmerged.



---
### Detected Package Files

 * `.github/workflows/check-requirements.yml` (github-actions)
 * `.github/workflows/lint.yml` (github-actions)
 * `.github/workflows/publish.yml` (github-actions)
 * `.github/workflows/regen-examples-and-docs.yml` (github-actions)
 * `.github/workflows/test-website.yml` (github-actions)
 * `.github/workflows/test.yml` (github-actions)
 * `requirements/all.txt` (pip_requirements)
 * `requirements/docs.txt` (pip_requirements)
 * `requirements/flake8.txt` (pip_requirements)
 * `requirements/mypy.txt` (pip_requirements)
 * `requirements/pytest.txt` (pip_requirements)
### Configuration

🔡 Renovate has detected a custom config for this PR. Feel free to ask
for [help](https://togithub.com/renovatebot/renovate/discussions) if you
have any doubts and would like it reviewed.

Important: Now that this branch is edited, Renovate can't rebase it from
the base branch any more. If you make changes to the base branch that
could impact this onboarding PR, please merge them manually.


### What to Expect

With your current configuration, Renovate will create 2 Pull Requests:

<details>
<summary>Update pip-dependencies</summary>

  - Schedule: ["after 6pm"]
  - Branch name: `renovate/pip-dependencies`
  - Merge into: `main`
  - Upgrade [isort](https://togithub.com/pycqa/isort) to `==5.11.4`
- Upgrade
[pytest-asyncio](https://togithub.com/pytest-dev/pytest-asyncio) to
`==0.20.3`


</details>

<details>
<summary>Update dependency mkdocs-material to v9</summary>

  - Schedule: ["after 6pm"]
  - Branch name: `renovate/major-pip-dependencies`
  - Merge into: `main`
- Upgrade
[mkdocs-material](https://togithub.com/squidfunk/mkdocs-material) to
`>=9,<10`


</details>


---

❓ Got questions? Check out Renovate's
[Docs](https://docs.renovatebot.com/), particularly the Getting Started
section.
If you need any further assistance then you can also [request help
here](https://togithub.com/renovatebot/renovate/discussions).


---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://app.renovatebot.com/dashboard#github/AlexWaygood/typeshed-stats).

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Alex Waygood <[email protected]>

Author: renovate[bot]

.github/dependabot.yml

@@ -0,0 +1,31 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "pip_requirements": {
+    "fileMatch": [
+      "^requirements/[^/]+\\.txt$"
+    ]
+  },
+  "packageRules": [
+    {
+      "groupName": "github-actions",
+      "matchManagers": [
+        "github-actions"
+      ],
+      "description": "Group all GitHub Action dependencies",
+      "separateMajorMinor": "false"
+    },
+    {
+      "groupName": "pip-dependencies",
+      "matchManagers": [
+        "pip_requirements"
+      ],
+      "description": "Group all pip requirements"
+    }
+  ],
+  "schedule": [
+    "after 6pm"
+  ]
+}