Added info in TODO.md

Fortune for enumerate-ordered's current commit: Future small blessing − 末小吉

Cargo.lock

@@ -97,7 +97,7 @@ dependencies = [
 
 [[package]]
 name = "enumerate-ordered"
-version = "1.1.0"
+version = "1.1.1"
 dependencies = [
  "color-eyre",
  "futures",

TODO.md

@@ -0,0 +1,2 @@
+TODO: Support -R - Non-blind recursion (like sxiv-ordered)
+NOTE: Nesting BTreeSet is probably not the best way to go about this...