rebber@5.1.0

• add missing dependencies (#384);
• fix linkReference default macro (uses hyperref from hypertext package instead of bare ref).

rebber-plugins@4.1.0

• add a \ping command to serialize remark-ping;
• new preprocessor to avoid spoiler in spoiler (#280);
• fix appendices management (#299);
• fix grid-table serialization (#374 & #375).

remark-ping@1.0.9: zmarkdown: don't ensure pinged usernames exist

add rel="not-follow" on links generated by remark-ping