815330dad2 Clean up weight unit tests (Tobin C. Harding)
3f4365ee0c api: Run just check-api (Tobin C. Harding)
75594c7299 Add Weight::to_kwu_ceil (Tobin C. Harding)
Pull request description:
It is not immediately obvious why we have floor and ceil versions of `to_vbytes` but not for `to_kwu`.
Add a conversion function to get weight by kilo weight units rounding up.
And then clean up the `weight` unit tests.
ACKs for top commit:
apoelstra:
ACK 815330dad2d2026ecf11c998dd560217c8d05d52; successfully ran local tests
Tree-SHA512: 8ba6c255fb9a3bc4a3dd485d6875663976870805a639b0aa309727fd211460029d05154351522d2b753afd478df1187abd92b212512b140c1ddb24b34b7e2bc0