Add holocene to OP spec #4319

Job	Run time
docs	1m 2s
check	24s
check no_std	21s
check serde	19s
check no_std kzg-rs	26s
check std	25s
clippy	1m 24s
test stable --no-default-features	53s
test stable	48s
fmt	9s
test stable --all-features	1m 16s
TyposCheck	5s
test beta --no-default-features	1m 56s
test beta	1m 57s
test beta --all-features	2m 4s
test nightly --no-default-features	1m 49s
test nightly	1m 52s
test nightly --all-features	1m 52s
	19m 2s

Provide feedback