Stop generating last_update, and generate pretty-printed JSONs

exe/quby-compile

@@ -35,8 +35,7 @@ paths.each do |path|
 
   key = File.basename(File.dirname(path))
   sourcecode = File.read(path)
-  last_update = File.mtime(path)
-  compiled = Quby::Compiler.compile(key, sourcecode, path: path, lookup_tables: lookup_tables, last_update: last_update)
+  compiled = Quby::Compiler.compile(key, sourcecode, path: path, lookup_tables: lookup_tables)
 
   FileUtils.mkdir_p(File.join(output_path, key))
   compiled[:outputs].each do |type, output|