xpinyin: 提升版本号

Author: qinglee

xpinyin/xpinyin.dtx

@@ -170,9 +170,9 @@ Copyright and Licence
 %<+package>\GetIdInfo$Id$
 %<package>  {Automatically add pinyin to Chinese characters}
 %<package>\ProvidesExplPackage{\ExplFileName}
-%<package>  {\ExplFileDate}{3.0}{\ExplFileDescription}
+%<package>  {\ExplFileDate}{3.1}{\ExplFileDescription}
 %<database>\ProvidesFile{xpinyin-database.def}%
-%<database>  [2022/06/04 v3.0 xpinyin database]
+%<database>  [2022/07/14 v3.1 xpinyin database]
 %<*driver>
 \documentclass{ctxdoc}
 \usepackage{xpinyin}