refactor/dependence: Upgrade Golang version and dependencies. (#322)

* chore: Set up automated package updates with dependabot.

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+#    ignore:
+#      - dependency-name: "example-package"
+#        versions: ["2.x.x"]
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    open-pull-requests-limit: 5