bin/explain in shiba-0.4.0 vs bin/explain in shiba-0.5.0

@@ -23,12 +23,14 @@
 end
 
 file = options.delete("file")
 file = File.open(file, "r") if file
 
-Shiba.configure(options) do |err_msg|
-  $stderr.puts(err_msg)
+begin
+  Shiba.configure(options)
+rescue Shiba::ConfigError => e
+  $stderr.puts(e.message)
   $stderr.puts(parser)
   exit 2
 end
 
 schema_stats_fname = options["stats"]
@@ -48,10 +50,10 @@
 end
 
 table_stats = Shiba::TableStats.new(Shiba.index_config, Shiba.connection, {})
 queries = Shiba::Analyzer.analyze(file, json, table_stats, options)
 
-problems = queries.select { |q| q[:cost] && q[:cost] > 100 }
+problems = queries.select { |q| q[:severity] && q[:severity] != 'none' }
 
 if problems.any?
   query_word = problems.size == 1 ? 'query' : 'queries'
   $stderr.puts "#{problems.size} problematic #{query_word} detected"