editors/tp-note: update to 1.19.12

Viewer: better detect changes with simple editors

In theory watching only 'file' is enough. Unfortunately some file
editors do not modify files directly. They first rename the existing
file on disk and then  create a new file with the same filename. As
a workaround, we watch the whole directory where the file resides.
False positives, there could be other changes in this directory
which are not related to 'file', are detected, as we only trigger
the rendition to HTML when 'debounced_event.path' corresponds to our
watched file.

(pin)