configure dependabot (#76)

diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
new file mode 100644
index 0000000..edbfd65
--- /dev/null
+++ b/.github/dependabot.yaml
@@ -0,0 +1,9 @@
+# Dependabot configuration file - enable regular dependencies checks.
+version: 2
+enable-beta-ecosystems: true
+
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"