textproc/libe-book: update to 0.1.4 release (+)

libe-book 0.1.4:

• Fix various problems when reading broken files, found with the help of american-fuzzy-lop and oss-fuzz.
• Do not access the network when parsing XML.
• Add a fuzzer for FictionBook v.2.
• Fix build with ICU 68.
• Fix build with recent MSVC.