Support 32bit architectures

[Niederb]

The api-client does currently not compile for 32bit architectures. As wasm typically compiles to 32bit we have to fix this first in order to continue with #272 .
The issue is due to a missing BitStore implementation for u64 on for 32bit architectures
See ferrilab/bitvec#75 and https://docs.rs/bitvec/latest/src/bitvec/store.rs.html#194
Compile error:

error[E0277]: the trait bound `u64: BitStore` is not satisfied
   --> node-api/src/decoder/decode.rs:285:58
    |
285 |         (BitOrderTy::U64, BitStoreTy::Lsb0) => to_bit_sequence(BitVec::<u64, Lsb0>::decode(data)?),
    |                                                                ^^^^^^^^^^^^^^^^^^^ the trait `BitStore` is not implemented for `u64`

error[E0599]: no method named `encode_to` found for struct `BitVec` in the current scope
   --> node-api/src/decoder/encode.rs:567:53
    |
567 |             bools.into_iter().collect::<BitVec<u64, Msb0>>().encode_to(bytes);
    |                                                              ^^^^^^^^^ method not found in `BitVec<u64, Msb0>`