Update dependencies and resolve JODConverter breaking changes, including
changes which mitigate some vulnerabilities in commons-compress and
commons-io. See #13.
Support for merging workbooks, so you can have a template which uses formulas
which act on data from some named sheet, and then fill in that named sheet.
New top-level helpers for working with grid ([[cell]]) data structures
Vertical as well as horizontal merged cells
New constructors to build grids from tables and trees (table-grid and
tree-grid), which supplant the deprecated constructors from v1.x (tree
and table)