The files tablist.el and tablist-filter.el are no longer part of
  pdf-tools, but continue to live on in the tablist package, on which
  pdf-tools now depends on.
* Encrypted files
  When encountering an encrypted file, query for a password and
  attempt to decrypt it.
* Backward sync from isearch
  In isearch, press M-s s to visit the source of the current match.
* Disable unicode in mode-line
  New variable pdf-view-use-unicode-lighter which allows for
  disabling the use of unicode in the mode-line.