26.1.0

• Fixed strutils.singularize mangling words ending in 'ss'
• Fixed fileutils.AtomicSaver to accept os.PathLike
• Fixed copy.copy/copy.deepcopy collapsing dictutils.OrderedMultiDict values
• Sped up strutils.MultiReplace match lookup
• Fixed setutils.IndexedSet out-of-range negative indexing wrapping around
• Fixed setutils.IndexedSet slicing after removals

Full Changelog: 26.0.0...26.1.0