feat(ci): add dependabot (#38)

.config/dictionaries/project.dic

@@ -7,4 +7,5 @@ localizable
 mdlint
 pubspec
 rustc
-Traceback
+stevenj
+Traceback

.github/dependabot.yml

@@ -0,0 +1,42 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    assignees:
+      - "minikin"
+      - "stevenj"
+
+  - package-ecosystem: "pub"
+    directory: "/catalyst_voices"
+    schedule:
+      interval: "monthly"
+    assignees:
+      - "minikin"
+
+  - package-ecosystem: "pub"
+    directory: "/catalyst_voices_packages"
+    schedule:
+      interval: "monthly"
+    assignees:
+      - "minikin"
+
+  - package-ecosystem: "cargo"
+    directory: "/athena"
+    schedule:
+        interval: "monthly"
+    assignees:
+      - "stevenj"
+
+  - package-ecosystem: "cargo"
+    directory: "/catalyst-voices-backend"
+    schedule:
+        interval: "monthly"
+    assignees:
+      - "stevenj"