Added model `SPDiffableCustomTableRow` and cell for it.

1.6.6

Updated version.

Refractored files. Added `reload(_ item:)` and `reload(_ items:)` functions.

1.6.5

Refractored files. Added `reload(_ item:)` and `reload(_ items:)` fun…

Added completions to apply content and sections.

1.6.4

Added completions to SPDiffable.

Fixed iOS deployment target to 12.0.

1.6.2

Fixed iOS deployment tartet to 12.0

Updated Readme.

1.6.1

Updated Readme.

Added reload methods to diffable data source.

1.6.0

Added reload methods to diffable data source.

Updated Readme.

1.5.1

Updated Readme.

Fixed cell registration bug.

1.5.0

Fixed cell registration bug.

Updated actionable items.

1.4.2

Update SPDiffable.podspec

Fixed protected level. Fixed header and footer logic for collection diffable.

1.4.1

Updated version.