beacon-wasm: use the builtin serde feature provided by wasm-bindgen
beacon, beacon-wasm: fix incorrect example block and remove f64 parsing for uint
wasm: fix U1099511627776 exceeding u32 limit
dep: update bm-le to 0.10
beacon-wasm: webassembly-compiled beacon state transition function
srml-casper: introduce epoch number
srml-casper: implement slashing conditions
Casper consensus in SRML
Embed all yamltests in CI and Rust tests
Directly put everything under test cfg