sysutils/vector: Unbreak with Rust 1.53.0

error[E0308]: mismatched types
  --> cargo-crates/lexical-core-0.7.4/src/atof/algorithm/bhcomp.rs:62:24
   |
62 |     let bytes = bits / Limb::BITS;
   |                        ^^^^^^^^^^ expected `usize`, found `u32`

error[E0277]: cannot divide `usize` by `u32`

http://package23.nyi.freebsd.org/data/114i386-default-foo/2021-06-18_08h49m22s/logs/errors/vector-0.10.0_5.log

PR:		256653