Replace Dependabot with Renovate (#3080)

Author: hazzik

.github/dependabot.yml

@@ -0,0 +1,39 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:base"
+  ],
+  "configMigration": true,
+  "pruneStaleBranches": false,
+  "automerge": true,
+  "platformAutomerge": true,
+  "labels": [
+    "dependencies",
+    "p: Lowest",
+    "t: Task"
+  ],
+  "packageRules": [
+    {
+      "matchPackagePrefixes": [
+        "NUnit"
+      ],
+      "groupName": "NUnit"
+    }, 
+    {
+      "matchPackageNames": [
+        "Microsoft.AspNetCore",
+        "Microsoft.AspNetCore.Mvc",
+        "Microsoft.AspNetCore.Mvc.Razor.ViewCompilation",
+        "Microsoft.AspNetCore.StaticFiles"
+      ],
+      "groupName": "Microsoft.AspNetCore 2.0",
+      "allowedVersions": "~2.1.0"
+    },
+    {
+      "matchPackagePrefixes": [
+        "Oracle.ManagedDataAccess"
+      ],
+      "groupName": "Oracle.ManagedDataAccess"
+    }
+  ]
+}