Enable dependabot (#634)

* Enable dependabot

* Add CODEOWNERS

.github/CODEOWNERS

@@ -0,0 +1,4 @@
+# https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners
+# Order is important; the last matching pattern takes the most precedence.
+
+*      @svetasmirnova

.github/dependabot.yml

@@ -0,0 +1,11 @@
+---
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"