versions

analogue to code of function `update_repository()`

v0.1.0 -------------------------------------------------------------------------

First release

v0.2.0 -------------------------------------------------------------------------

- adds optional variable 'location' to data level tissue_portion

v0.3.0 -------------------------------------------------------------------------

- adds optional variable 'comment_<data_level>' to storage data.frames

v0.4.0 -------------------------------------------------------------------------

- adds optional variable 'surgeon' to storage data.frame
- removes working_group from the ID variables of tissue donor and adds it
  to required variables of tissue sample