Update procfs requirement from 0.15.0 to 0.16.0 (#108) #146

Job	Run time
build (ubuntu-latest, stable, false)	1m 10s
build (ubuntu-latest, beta, false)	1m 33s
build (macos-11, stable, false)	1m 21s
build (macos-11, beta, false)	1m 20s
build (macos-12, stable, false)	2m 4s
build (macos-12, beta, false)	59s
build (macos-13, stable, false)	1m 12s
build (macos-13, beta, false)	1m 10s
build (ubuntu-latest, nightly, true)	3m 45s
build (macos-11, nightly, true)	4m 38s
build (macos-12, nightly, true)	3m 48s
build (macos-13, nightly, true)	3m 58s
	26m 58s

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