v0.6.0

What's Changed

• Add generated test classes to silverstripe manifest by @Cambis in #10
• Add nullable string types by @Cambis in #12
• Resolve class names using the Injector API by @Cambis in #14
• Add missing set lists up to 6.0 by @Cambis in #15
• Update bootstrap file to only include \SilverStripe\Dev\TestOnly classes during test runs by @Cambis in #17

Full Changelog: v0.5.1...v0.6.0