ecs-swift v0.2.0

What's Changed

• Feat/sparse set #15 by @rrbox in #69
• fix: world initializer by @rrbox in #71
• Feat/query target by @rrbox in #63
• Feat/entity hierarchy by @rrbox in #78
• Spawn コマンドに @discardableResult を追加 by @rrbox in #87
• Bundle by @rrbox in #94
• change: 複数のパラメータを持つ Query の実装を Swift Macros に変更 by @rrbox in #91
• System macro by @rrbox in #92
• fix: typo by @rrbox in #95
• Update README.md by @rrbox in #97
• Commands entity return type by @rrbox in #98
• Update readme by @rrbox in #101
• v0.2.0 develop by @rrbox in #72

Full Changelog: 0.1.2...0.2.0