Configure Renovate (#144)

* Add renovate.json
* Enable 'pipenv' package manager
* Enable lock file maintenance

---------

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

Author: renovate[bot]

renovate.json

@@ -0,0 +1,27 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "assigneesFromCodeOwners": true,
+  "extends": [
+    "schedule:nonOfficeHours"
+  ],
+  "dependencyDashboard": true,
+  "enabledManagers": [
+    "pipenv"
+  ],
+  "lockFileMaintenance": {
+    "enabled": true,
+    "recreateWhen": "always",
+    "rebaseStalePrs": true,
+    "branchTopic": "lock-file-maintenance",
+    "commitMessageAction": "Lock file maintenance",
+    "commitMessageTopic": null,
+    "commitMessageExtra": null,
+    "schedule": [
+      "* 4 * * 1"
+    ],
+    "groupName": null,
+    "prBodyDefinitions": {
+      "Change": "All locks refreshed"
+    }
+  }
+}