build: update .npmignore files to include only essential files #491

Job	Run time
list-packages	3s
tests (ubuntu-latest, 20, redis-smq-rest-api)	2m 10s
tests (ubuntu-latest, 20, redis-smq-common)	3m 4s
tests (ubuntu-latest, 20, redis-smq)	10m 21s
	15m 38s

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