canal 1.1.5-alpha2 同步不兼容postgresql

[yansheng105]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

environment

• canal version : canal 1.1.5-alpha2
• mysql version : mysql5.7

Issue Description

使用 canal 1.1.5-alpha2 同步mysql数据到 postgresql 报SQL语法错误。

源代码：

        insertSql.append("INSERT INTO ").append(SyncUtil.getDbTableName(dbMapping)).append(" (");

        columnsMap.forEach((targetColumnName, srcColumnName) -> insertSql.append("`")
            .append(targetColumnName)
            .append("`")
            .append(","));

` 是mysql 的转义字符，postgresql不识别，其他不兼容的关系型数据库也会报错

[Tezzxamo]

全是问题，都没人测一下就提交合并代码？