Wrapper tests: BigNumber & SHA3

[rihp]

closing #20 in favor of this cleaner PR

9 passed, 12 skipped

None of the SHA3 wrapper can be executed at the moment due to a WasmTime error related to interface types:

E           wasmtime._error.WasmtimeError: failed to parse WebAssembly module
E           Caused by:
E               Unsupported feature: Support for interface types has temporarily been removed from `wasmtime`.
E               For more information about this temoprary you can read on the issue online:
E                   https://github.com/bytecodealliance/wasmtime/issues/1271
E               and for re-adding support for interface types you can see this issue:
E                   https://github.com/bytecodealliance/wasmtime/issues/677

Below full error log trace

[Niraj-Kamdar]

LGTM!