v2.1.8

This is a minor release that verifies that the code is functional with Java 11. Also updated some dependencies to resolve some CVE's.

Gradle Users:

implementation 'com.damnhandy:handy-uri-templates:2.1.8'

Maven Users:

<dependency>
    <groupId>com.damnhandy</groupId>
    <artifactId>handy-uri-templates</artifactId>
    <version>2.1.8</version>
</dependency>