chore(taskfile): add task to update fantasy and catwalk

Taskfile.yaml

@@ -123,3 +123,10 @@ tasks:
     cmds:
       - git tag -d nightly || true
       - git fetch --tags
+
+  deps:
+    desc: Update Fantasy and Catwalk
+    cmds:
+      - go get charm.land/fantasy
+      - go get github.com/charmbracelet/catwalk
+      - go mod tidy