Release v4.13.1

Fixed

• The language service now highlights and completes every construct the compiler accepts. capture, projection, reducer, contribute, dialog, form, theme and ui had no keyword entry, so they appeared unrecognized in the editor despite compiling (#198)
• The projection grammar reference no longer describes syntax more strictly than the compiler accepts: every takes a bare automap, composite-key braces are optional, and $causedBy is a valid expression root