Tests

refactor(Inspector): add CallOutcome to call/call_end (#985) #6

Job	Run time
check no-default-features	29s
check serde	28s
test stable --no-default-features	50s
test no_std	27s
test stable	46s
check std	18s
test stable --all-features	1m 2s
clippy	1m 29s
test beta --no-default-features	42s
docs	1m 22s
test beta	46s
fmt	16s
test beta --all-features	1m 3s
test nightly --no-default-features	46s
test nightly	52s
test nightly --all-features	1m 15s
	12m 51s

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