Merge pull request #22 from davxy/master #15

Job	Run time
validate (erasure)	36s
validate (codec)	34s
validate (traces)	38s
validate (stf/assurances)	32s
validate (stf/authorizations)	36s
validate (stf/history)	34s
validate (stf/safrole)	37s
validate (stf/accumulate)	20s
validate (stf/preimages)	24s
validate (stf/disputes)	29s
validate (stf/statistics)	32s
validate (stf/reports)	33s
	6m 25s

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