When ordinary Lodash changes shared catalog data, the Lodash FP module offers immutable versions of its functions instead. An immutable function creates a new data version without changing the value it receives. section 4.2
Updating nested catalog data
Set ["catalog", "booksByIsbn", "978-1779501127", "publicationYear"] to 1986, assigning the returned value to nextLibraryData while preserving libraryData. section 4.2
