t-io 3.6.0 release, routinely issued version

This is a routine development version (modified fewer points)

This update

1. pom dependency management upgrade
2. Other minor modifications

pom coordinates

<dependency>
    <groupId>org.t-io</groupId>
    <artifactId>tio-core</artifactId>
    <version>3.6.0.v20200315-RELEASE</version>
</dependency>

Routine Description

t-io is a single support one million TCP connection length in a network station (and not just a networking framework)