Migrate renovate config (#413)

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

Author: renovate[bot]

.github/renovate.json

@@ -1,41 +1,39 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:base",
+    "config:recommended",
     ":semanticCommitsDisabled",
     "schedule:monthly"
   ],
-  "reviewers": [
-    "team:sig-ux"
-  ],
+  "reviewers": ["team:sig-ux"],
   "automerge": true,
   "packageRules": [
     {
       "matchDatasources": ["npm"],
       "addLabels": ["javascript"],
-      "stabilityDays": 3
+      "minimumReleaseAge": "3 days"
     },
     {
       "matchPackageNames": ["node"],
       "allowedVersions": "/20.[0-9]+.[0-9]+(.[0-9]+)?$/"
     }
   ],
-  "regexManagers": [
+  "customManagers": [
     {
+      "customType": "regex",
       "fileMatch": ["pom.xml"],
-      "matchStrings": ["<node.version>(?<currentValue>.*?)<\/node.version>"],
+      "matchStrings": ["<node.version>(?<currentValue>.*?)</node.version>"],
       "depNameTemplate": "node",
       "datasourceTemplate": "npm"
     },
     {
+      "customType": "regex",
       "fileMatch": ["pom.xml"],
-      "matchStrings": ["<npm.version>(?<currentValue>.*?)<\/npm.version>"],
+      "matchStrings": ["<npm.version>(?<currentValue>.*?)</npm.version>"],
       "depNameTemplate": "npm",
       "datasourceTemplate": "npm"
     }
   ],
-  "labels": [
-    "dependencies"
-  ],
+  "labels": ["dependencies"],
   "rebaseWhen": "conflicted"
 }