upgrade_datafile: Upgrade a 'data input file'
In Burke-Lauenroth-Lab/SoilWat_R_Wrapper: Simulation Framework for SOILWAT2

Add (a) new column(s)

Add a column of critical soil water potential (SWPcrit) for each functional type

Add a column of total organic content (TOC) for each soil layer

upgrade_datafile(file, new_name, insert_after_tag, inserted_colnames)

upgrade_prodin_v10_to_v11(file, new_name = NULL)

upgrade_soilsin_v11_to_v12(file, new_name = NULL)

`file`	A character string. The file path to the datafile to upgrade.
`new_name`	A character string. The basename of the upgraded file. If `NULL` then the code attempts to replace `‘vOLD’` with `‘vNEW’` in `file`.
`insert_after_tag`	A character string. A string identifying existing column(s) after which new columns are added.
`inserted_colnames`	A character vector. Column name(s) to be added to `file`.