This enables us to automatically create configuration formats from enums
or structs. For enums, we create a structure with a field for each
case, representing a pattern match; the configuration format can then
enter a different expression for each case. For structs, we create an
enum with a variant for each field, representing projecting by that
field; the configuration format selects the field to project from, and
then can write a further expression on that field (for instance, it can
perform another pattern match).
So far we don't actually have anything that *uses* this functionality;
I decided to finish it for the purpose of specifying a default
lantern offset, only to discover that we already return a lantern offset
from the animation crate. So I fixed it there instead.
- replace serde_derive by feature of serde
incl. source code modifications to compile
- reduce futures-timer to "2.0" to be same as async_std
- update notify
- removed mio, bincode and lz4 compress in common as networking is now in own crate
btw there is a better lz4 compress crate, which is newer than 2017
- update prometheus to 0.9
- can't update uvth yet due to usues
- hashbrown to 7.2 to only need a single version
- libsqlite3 update
- image didn't change as there is a problem with `image 0.23`
- switch old directories with newer directories-next
- no num upgrade as we still depend on num 0.2 anyways
- rodio and cpal upgrade
- const-tewaker update
- dispatch (untested) update
- git2 update
- iterations update
