Merge pull request #2141 from Kobzol/add-serde-1.0.219-4threads #4214

Job	Run time
Test on Windows	1m 59s
Test codegen backend benchmarks	5m 8s
Test benchmarks (--include cargo-0.87.1,stm32f4-0.15.1, Check,Debug,Doc)	9m 26s
Test benchmarks (--exclude cargo-0.87.1,stm32f4-0.15.1, Opt)	14m 49s
Test profiling	6m 16s
Test and deploy	4m 10s
Test benchmarks (--include cargo-0.87.1,stm32f4-0.15.1, Opt)	11m 46s
Database Check	1m 14s
Test runtime benchmarks	9m 28s
Test benchmarks (--exclude cargo-0.87.1,stm32f4-0.15.1, Check,Debug,Doc)	16m 50s
Compare page endpoint test	8m 59s
	1h 30m 5s

Provide feedback