1.0.0-1.3

This release is available in the Maven Central repository as:

<dependency>
    <groupId>me.desair.tus</groupId>
    <artifactId>tus-java-server</artifactId>
    <version>1.0.0-1.3</version>
</dependency>

Fixes:

• Change Base64 encoding and decoding logic to be compatible with JDK 11: issue #14
• Updated test dependencies in order to be able to run tests on JDK 11: PR #16
• Configured Travis to run builds on JDK 8, JDK 9 and JDK 11 (all with Java target version 7)