Sync Relay stubs with v0.7.0 #1938

Job	Run time
Run cs-fixer and stubs structure tests	2m 39s
Run tests against php 5.6	12m 21s
Run tests against php 7.0	12m 6s
Run tests against php 7.1	12m 17s
Run tests against php 7.2	13m 15s
Run tests against php 7.3	13m 15s
Run tests against php 7.4	13m 54s
Run tests against php 8.0	15m 16s
Run tests against php 8.1	15m 8s
Run tests against php 8.2	14m 30s
Run tests against php 8.3	15m 2s
	2h 19m 43s

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