SeuratObject 4.0.1

Added:

• New head and tail methods to quickly query object metadata (#5)
• New utility functions (#6):
  • AttachDeps to attach required imported dependencies on package attachment
  • IsMatrixEmpty to test if a matrix is empty or not

Changed:

• Allow supper classes to replace child classes (#1)
• Better support for creating sparse matrices from data.table and tibble objects (#4)
• Improved error messages for clashing object names (#7)
• Allow returning a NULL if a subset results in zero cells (#9)

Removed:

• SCT-specific code (#2)