v0.2.0

One spec change on this release, for the build source, inline dockerfiles have been moved to just use the source field, which now support an "inline" source type.
In the future we may bring back the ability to provide a dockerfile as a separate item from the build source but have opted for simplicity right now.

What's Changed

• Validate rpm fields by @cpuguy83 in #161
• Source Refactor by @adamperlin in #117
• Release multiple tags by @cpuguy83 in #167
• Add user in image config by @cpuguy83 in #168
• Remove old "inline" field for build source by @cpuguy83 in #165
• add initial support for SOURCE_DATE_EPOCH by @DannyBrito in #175
• Update buildkit to 0.13.0 by @cpuguy83 in #174
• Add support for Windows (cross compiled) by @pmengelbert in #108

Full Changelog: v0.1.0...v0.2.0