参考https://www.jianshu.com/p/d768f6d1d93b?tdsourcetag=s_pctim_aiomsg 

-optimizationpasses 4 #指定代码压缩级别
-obfuscationdictionary dictionary_extra.txt #外部字典
-classobfuscationdictionary dictionary_class.txt #类字典
-packageobfuscationdictionary dictionary_package.txt #包字典
-ignorewarnings#屏蔽警告