chore: Switch to renovate

Author: epage

.github/dependabot.yml

@@ -0,0 +1,34 @@
+{
+  "semanticCommits": "enabled",
+  "configMigration": true,
+  "packageRules": [
+    // Goals:
+    // - Keep version reqs low, ignoring compatible normal/build dependencies
+    // - Take advantage of latest dev-dependencies
+    // - Help keep versions down by always using latest breaking change
+    // - Rollup safe upgrades to reduce CI runner load
+    // - Have lockfile and manifest in-sync
+    {
+      "matchManagers": ["cargo"],
+      "matchDepTypes": ["dev-dependencies"],
+      "matchUpdateTypes": ["patch"],
+      "automerge": true,
+      "groupName": "dev",
+    },
+    {
+      "matchManagers": ["cargo"],
+      "matchUpdateTypes": ["major"],
+    },
+    {
+      "matchManagers": ["cargo"],
+      "matchUpdateTypes": ["minor"],
+      "enabled": false,
+    },
+    {
+      "matchManagers": ["cargo"],
+      "matchDepTypes": ["build-dependencies", "dependencies"],
+      "matchUpdateTypes": ["patch"],
+      "enabled": false,
+    },
+  ],
+}

.github/renovate.json5

@@ -1,3 +1,3 @@
 style="conventional"
-ignore_author_re="dependabot"
+ignore_author_re="(dependabot|renovate)"
 merge_commit = false