配置pagehelper

<properties>
    <pagehelper.version>3.4.2-fix</pagehelper.version>
</properties>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>${pagehelper.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>