0.5.2

ADDED

• Chunk now has an insert_from method for inserting multiple values at an index in one go.
• Chunk now also has an insert_ordered method for inserting values into a sorted chunk.
• SparseChunk now has the methods option_iter(), option_iter_mut() and option_drain() with their corresponding iterators to iterate over a chunk as if it were an array of Options.
• Arbitrary implementations for all data types have been added behind the arbitrary feature flag.