React DOM

• Fix performance of React.lazy for large numbers of lazily-loaded components. (@acdlite in #14429)
• Clear fields on unmount to avoid memory leaks. (@trueadm in #14276)
• Fix bug with SSR and context when mixing react-dom/server@16.6 and react@<16.6. (@gaearon in #14291)
• Fix a performance regression in profiling mode. (@bvaughn in #14383)

Scheduler (Experimental)

• Post to MessageChannel instead of window. (@acdlite in #14234)
• Reduce serialization overhead. (@developit in #14249)
• Fix fallback to setTimeout in testing environments. (@bvaughn in #14358)
• Add methods for debugging. (@mrkev in #14053)

Artifacts

• react: https://unpkg.com/react@16.7.0/umd/
• react-art: https://unpkg.com/react-art@16.7.0/umd/
• react-dom: https://unpkg.com/react-dom@16.7.0/umd/
• react-is: https://unpkg.com/react-is@16.7.0/umd/
• react-test-renderer: https://unpkg.com/react-test-renderer@16.7.0/umd/
• scheduler: https://unpkg.com/scheduler@0.12.0/umd/