Configure dependabot (#394)

.github/dependabot.yml

@@ -0,0 +1,38 @@
+# Dependabot dependency version checks / updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/cli"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/lib"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/filterer/ignore"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/filterer/globset"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/filterer/tagged"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/ignore-files"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "cargo"
+    directory: "/crates/project-origins"
+    schedule:
+      interval: "daily"