Add support for shld #897

Job	Run time
docker-master	1h 31m 43s
publish-standalone-dry-run	18s
test-standalone (master, dev, default)	1m 21s
build-wasm-of-ocaml (master, 4.14.1)	18m 40s
build-js-of-ocaml (master, 4.11.1)	5m 36s
validate-docker-master	2m 34s
standalone-haskell (master)	46m 39s
generated-files (master)	22m 25s
test-amd64	2h 16m 21s
deploy-js-wasm-of-ocaml	1m 17s
docker-check-all	3s
	5h 26m 57s

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