Update docs

ubelt/util_cache.py

@@ -179,6 +179,9 @@ class Cacher(object):
         cfgstr (str | None):
             Deprecated in favor of ``depends``.
 
+    Related:
+        ..[JobLibMemory] https://joblib.readthedocs.io/en/stable/memory.html
+
     Example:
         >>> import ubelt as ub
         >>> depends = 'repr-of-params-that-uniquely-determine-the-process'

ubelt/util_dict.py

@@ -1033,6 +1033,9 @@ class SetDict(dict):
             from all dictionaries where the key appears an odd number of times.
             Rightmost values take priority.
 
+    The full set of set operations was originally rejected in [Pep584]_, but
+    this module seeks to address some of these concerns.
+
     Note:
         The reason righmost values take priority in union /
         symmetric_difference and left-most values take priority in intersection
@@ -1065,6 +1068,7 @@ class SetDict(dict):
 
     References:
         .. [RubyMerge] https://ruby-doc.org/core-2.7.0/Hash.html#method-i-merge
+        .. [Pep584] https://peps.python.org/pep-0584/#what-about-the-full-set-api
 
     CommandLine:
         xdoctest -m ubelt.util_dict SetDict