feat(php): drop support for EOLed PHP versions and unify min required… #2

Job	Run time
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOf)	2m 30s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AllOf)	1m 43s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/FormModels)	2m 1s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/Petstore)	2m 21s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/AnyOfNoCompare)	1m 51s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOfNoCompare)	2m 21s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AllOf)	2m 11s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/OneOf)	2m 5s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/AnyOf)	1m 46s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/FormModels)	1m 59s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/Petstore)	59s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.8/UseDateTimeForDate)	1m 50s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/UseDateTimeForDate)	2m 9s
Build .Net projects (samples/client/petstore/csharp/generichost/net4.7/OneOf)	2m 7s
	27m 53s

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