Add `jupyterlab_h5web` package #21

Job	Run time
docker-test (latest, Dockerfile)	6m 30s
docker-test (latest-openscope, Dockerfile.openscope)	8m 4s
docker-test (latest-allensdk, Dockerfile.allensdk)	6m 51s
docker-test (latest-gpu, Dockerfile.gpu)	7m 29s
docker-test (latest-gpu-allensdk, Dockerfile.gpu.allensdk)	7m 48s
docker-test (latest-matlab, Dockerfile.matlab)	4m 28s
	41m 10s

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