Setup renovate (#49)

.github/renovate.json

@@ -0,0 +1,32 @@
+{
+    "extends": [
+        "config:base"
+    ],
+    "packageRules": [
+        {
+            "datasources": [
+                "go"
+            ],
+            "extends": [
+                ":automergeMinor",
+                ":automergePr"
+            ],
+            "postUpdateOptions": [
+                "gomodTidy"
+            ]
+        },
+        {
+            "datasources": [
+                "npm"
+            ],
+            "groupName": "npm",
+            "schedule": ["after 9pm on sunday"]
+        }
+    ],
+    "assignees": [
+        "cugu"
+    ],
+    "ignoreDeps": [
+        "sass-loader"
+    ]
+}