Commits on Jun 21, 2024

1. Restore 1.60 MSRV and fix build …

   Seems some changes I force pushed to dalek-cryptography#123 didn't wind up getting merged.
   In that PR, I noted that `pub const fn new` was MSRV breaking and got
   rid of the `const` but that didn't end up in `develop`.
   
   I also encountered a build failure on `develop` since the legacy
   `black_box` function wasn't gated on the `core_hint_black_box` feature
   and thus clashed with `core::hint::black_box` when it was imported:
   
   ```
      Compiling subtle v2.6.0 (/Users/tarcieri/src/subtle)
   error[E0255]: the name `black_box` is defined multiple times
      --> src/lib.rs:223:1
       |
   100 | use core::hint::black_box;
       |     --------------------- previous import of the value `black_box` here
   ...
   223 | fn black_box<T: Copy>(input: T) -> T {
       | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `black_box` redefined here
       |
       = note: `black_box` must be defined only once in the value namespace of this module
   help: you can use `as` to change the binding name of the import
       |
   100 | use core::hint::black_box as other_black_box;
       |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   
   warning: unused import: `core::hint::black_box`
      --> src/lib.rs:100:5
       |
   100 | use core::hint::black_box;
       |     ^^^^^^^^^^^^^^^^^^^^^
       |
       = note: `#[warn(unused_imports)]` on by default
   ```
   
   This is a breaking change since we shipped a `const fn` for
   `BlackBox::new` already, so I'd suggest releasing this as 2.6.1 and
   yanking 2.6.0 for being unintentionally MSRV breaking.

   

   tarcieri committed Jun 21, 2024
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2. CI: use 1.60 as the MSRV

   

   tarcieri committed Jun 21, 2024
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