fix(mstring): 修复前端模板引擎正则错误并同步逻辑

mixly/common/modules/mixly-modules/common/mstring.js

@@ -21,7 +21,7 @@ MString.tpl = (str, obj) => {
             return str;
         }
         for (let key in obj) {
-        let re = new RegExp("{[\s]*" + key + "[\s]*}", "gim");
+            let re = new RegExp(`{${key}}`, 'gm');
             str = str.replace(re, obj[key]);
         }
         return str;