Write mutated package
Arguments
- pkg_path
- (character) path to the original package. we don't overwrite any files in the original path/location 
- fxns
- (list) list of functions, output of - make_fxns()
- map
- (list) package map, output of - make_pkg_map()
Write mutated package
(character) path to the original package. we don't overwrite any files in the original path/location
(list) list of functions, output of make_fxns()
(list) package map, output of make_pkg_map()