Silence warnings from Crystal 0.34

src/spectator/command_line_arguments_config_source.cr

@@ -75,6 +75,8 @@ module Spectator
           builder.randomize
           parts = method.split(':', 2)
           builder.seed = parts[1].to_i if parts.size > 1
+        else
+          nil
         end
       end
     end

src/spectator/report.cr

@@ -42,6 +42,9 @@ module Spectator
           @failed_count += 1
         when PendingResult
           @pending_count += 1
+        when Result
+          # This case isn't possible, but gets the compiler to stop complaining.
+          nil
         end
       end
     end