Magma Core v2.1.0

What's Changed

• Multiple issue fixes by @twalmsley in #42
• Trillian updates by @GCHQDeveloper42 in #46
• GH #49 - Persisting HQDM Objects by @twalmsley in #55
• Added maven-release-plugin to pom. by @GCHQDeveloper42 in #56

Full Changelog: v2.0.0...v2.1.0