Ima fix `Fragment`

This release focuses on improving Fragment. We fixed a bunch of rendering bugs, removed <RouterProvider>, and added 404 fragments!

Breaking

• Remove <RouterProvider>. bff8788
• The middleware now emits navigation events like PUSH and REPLACE in addition to LOCATION_CHANGED. You should still depend on LOCATION_CHANGED to know when the navigation actually happens.

Added

• Added "404" routes with a forNoMatch prop on Fragment
• Swap in builder with more concurrency + other tweaks. Thanks @ryan-roemer ! 36d38d0
• Add hash router (#173) (thanks @Stuk !) (resolved #102)
• We use Prettier now!

Fixed

• Make fragments dynamic and connect()ed (#189) (resolved #195, #182, #179, #172, #171, #165, #144, #140, #139, #132, #115,