Replace Tagbot with dependabot (#76)

Author: BatyLeo

.github/dependabot.yml

@@ -1,7 +1,17 @@
-# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
 version: 2
 updates:
   - package-ecosystem: "github-actions"
-    directory: "/" # Location of package manifests
+    directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "weekly"
+  - package-ecosystem: "julia"
+    directories: # Location of Julia projects
+      - "."
+      - "./docs"
+      - "./test"
+    schedule:
+      interval: "weekly"
+    # groups: # uncomment to group all julia package updates into a single PR
+    #   all-julia-packages:
+    #     patterns:
+    #       - "*"