Tests

set deduct_caller in optimism handler (#988) #3

Job	Run time
check no-default-features	31s
check serde	31s
check std	57s
clippy	1m 23s
docs	2m 29s
fmt	16s
test no_std	1m 19s
test stable --no-default-features	1m 17s
test stable	2m 15s
test stable --all-features	1m 16s
test beta --no-default-features	1m 6s
test beta	1m 37s
test beta --all-features	1m 12s
test nightly --no-default-features	1m 3s
test nightly	1m 7s
test nightly --all-features	1m 10s
	19m 29s

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