Configure Renovate (#1896)

* Add renovate.json
* Target only next branch
* Constrain managers
* Allow major, use constraints for Python version.
* Don't auto PR known pinned dependencies.
* Bump it up.
* 🤞

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Bryan Culver <31187+bryanculver@users.noreply.github.com>

renovate.json

@@ -0,0 +1,17 @@
+{
+  "baseBranches": ["next"],
+  "constraints": {
+    "python": "3.7"
+  },
+  "enabledManagers": ["pip_requirements", "poetry"],
+  "extends": [
+    "config:base"
+  ],
+  "packageRules": [
+    {
+      "matchPackageNames": ["graphene-django-optimizer", "django-timezone-field", "django-taggit"],
+      "dependencyDashboardApproval": true
+    }
+  ],
+  "rangeStrategy": "bump"
+}