Merge pull request #3532 from reitermarkus/to_s

Add missing `to_s`.

Author: reitermarkus

Library/Homebrew/cask/lib/hbc/artifact/abstract_uninstall.rb

@@ -222,7 +222,7 @@ def each_resolved_path(action, paths)
         paths.each do |path|
           resolved_path = Pathname.new(path)
 
-          resolved_path = resolved_path.expand_path if path.start_with?("~")
+          resolved_path = resolved_path.expand_path if path.to_s.start_with?("~")
 
           if resolved_path.relative? || resolved_path.split.any? { |part| part.to_s == ".." }
             opoo "Skipping #{Formatter.identifier(action)} for relative path '#{path}'."