Bump version to 0.7.1

• Add privacy manifest
• Add visionOS support to the Cocoapods podspec, bump min version

Bump version to 0.7.0

1. visionOS is supported.
2. rename DataSource and Delegate.
3. bug fixed.

Bump version to 0.6.3

• Fix compilation errors

Bump version to 0.6.2

• BlankSlate.Alignment usage optimization.

Bump version to 0.6.1

• Fix BlankSlate.DataLoadStatus related bugs.
• Add reload(with:) method.
• Add reloadBlankSlate() method.
• Add reloadBlankSlate(with:) method.

Bump version to 0.5.0

• Rename bs.contentView to bs.view.
• Rename offset(forBlankSlate:) to alignment(forBlankSlate:).
• Rename blankSlateShouldBeInsertAtIndex(_:) to blankSlateShouldBeInsertedAtBack(_:).
• Add enum Alignment.
• Added CustomView example.
• Some code structure adjustments.

Bump version to 0.4.1

• fadeInDuration fixed.
• backgroundGradient(forBlankSlate:) added.
• renamed configure(_:for:) to blankSlate(_:configure:).

Bump version to 0.4.0

• Supports UIView and UIScrollView.

Bump version to 0.3.2

• Carthage supported.

Bump version to 0.3.1

• Rename to BlankSlate.
• Upgraded iOS and tvOS deployment targets to 12.0.
• Support namespace.