www/newsboat: 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

PR: 256653