[elpa] externals/emms updated (8cddda05d7 -> a01df752e1)

[ELPA Syncer]

elpasync pushed a change to branch externals/emms.

      from  8cddda05d7 * emms-lyrics-lrclib.el (emms-lyrics-lrclib-parse): Use 
'nil' for JSON null
       new  50bbee830c * AUTHORS: Add Erica Lina Qi
       new  b924bfa78b * doc/emms.texinfo: Documentation updates for Erica's 
patches.
       new  be18bd8b32 Add album artist to metaflac, tag editor, playlist sort 
and limit.
       new  a01df752e1 Add active playlist lock, browse and send songs from 
other playlists.


Summary of changes:
 AUTHORS                   |  1 +
 doc/emms.texinfo          | 30 ++++++++++++++++++++-
 emms-info-metaflac.el     |  1 +
 emms-metaplaylist-mode.el | 17 +++++++++---
 emms-playlist-limit.el    |  3 +++
 emms-playlist-mode.el     |  9 +++++++
 emms-playlist-sort.el     | 12 +++++----
 emms-tag-editor.el        |  2 +-
 emms.el                   | 68 ++++++++++++++++++++++++++++++-----------------
 9 files changed, 107 insertions(+), 36 deletions(-)