v0.5.22

What's Changed

• Add examples/singleapp/singleflight by @devlights in #806
• Add examples/metricsop/heapmemory by @devlights in #807
• Add metricsop/cpu.go by @devlights in #808
• Add metricsop/sched.go by @devlights in #809

Full Changelog: v0.5.21...v0.5.22