add acceptance rate info to Transition struct #264

Job	Run time
test (1.6, ubuntu-latest, x86)	3m 26s
test (1.6, ubuntu-latest, x64)	2m 55s
test (1.6, macOS-latest, x64)	3m 42s
test (1.6, windows-latest, x86)	13m 30s
test (1.6, windows-latest, x64)	11m 40s
test (1, ubuntu-latest, x86)	3m 46s
test (1, ubuntu-latest, x64)	3m 34s
test (1, macOS-latest, x64)	4m 0s
test (1, windows-latest, x86)	6m 26s
test (1, windows-latest, x64)	5m 30s
test (nightly, ubuntu-latest, x86)	4m 17s
test (nightly, ubuntu-latest, x64)	3m 22s
test (nightly, macOS-latest, x64)	5m 12s
test (nightly, windows-latest, x86)	8m 25s
test (nightly, windows-latest, x64)	5m 14s
	1h 24m 59s

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