4.0.8

What's Changed

• Remove misleading upstream.rbi, enable types in on_system by @dduugg in #15019
• Use ActiveSupport Hash#assert_valid_keys instead of refinement by @dduugg in #15018
• Add include_count parameter to pluralize util by @dtrodrigues in #15020
• analytics: improve InfluxDB cardinality by @MikeMcQuaid in #15021

Full Changelog: 4.0.7...4.0.8