This is used by install_tika() internally, 
or can be called directly on a jar file.
The latest jar files and checksums are at https://tika.apache.org/download.html.
tika_check(digest, jar = tika_jar(), algo = "sha512")logical if the jar checksum matches digest.
Character vector of length one with the target checksum.
Optional alternative path to a Tika jar file.
Optional algorithm used to create checksum. Defaults to SHA512.