fix: Add filtering for only array-returning relationship fields (#16)

Merge branch 'dev' of https://github.com/ForetagInc/alchemy into dev

refactor: SDL output

remove: `.github` directory

refactor: main.rs

fix: Schema re-generation

update: `arangodb_events_rs` crate to `0.1.5`

add: Schema regeneration (WIP)

implement: API Listener

add: ArangoDB Events trigger

remove: Useless `async-recursion` package

add: ArangoDB Events package

remove: JSON Scalar from filter match

add: JsonScalar

refactor: add `get_node` fn