MRG: bump rust core version to r0.12.1 (#2988)

MSRV: 1.65

Changes/additions:

* Clean up and refactor `KmerMinHash::merge` in core (#2973)
* core: add scaled selection to manifest; add helper functions for
collection and sig/sketch usage (#2948)
* core: enable downsample within select (#2931)

Updates:

* Deps: update typed-builder and histogram, bump MSRV to 1.65 (#2858)
* Bump tempfile from 3.9.0 to 3.10.0 (#2979)
* Bump rkyv from 0.7.43 to 0.7.44 (#2978)
* Bump memmap2 from 0.9.3 to 0.9.4 (#2958)
* Bump chrono from 0.4.31 to 0.4.33 (#2957)
* Bump serde from 1.0.195 to 1.0.196 (#2956)
* Bump serde_json from 1.0.111 to 1.0.113 (#2955)
* Bump web-sys from 0.3.66 to 0.3.67 (#2939)
* Bump wasm-bindgen-test from 0.3.39 to 0.3.40 (#2938)
* Bump rayon from 1.8.0 to 1.8.1 (#2937)
* Bump ouroboros from 0.18.2 to 0.18.3 (#2936)
* Bump histogram from 0.8.4 to 0.9.0 (#2935)
* Bump wasm-bindgen from 0.2.89 to 0.2.90 (#2925)
* Bump histogram from 0.8.3 to 0.8.4 (#2923)
* Bump serde_json from 1.0.110 to 1.0.111 (#2902)
* Bump serde from 1.0.194 to 1.0.195 (#2901)
* Bump serde_json from 1.0.108 to 1.0.110 (#2896)
* Bump ouroboros from 0.18.1 to 0.18.2 (#2894)
* Bump tempfile from 3.8.1 to 3.9.0 (#2893)
* Bump memmap2 from 0.9.2 to 0.9.3 (#2889)
* Bump memmap2 from 0.9.0 to 0.9.2 (#2882)
* Bump rkyv from 0.7.42 to 0.7.43 (#2880)
* Bump ouroboros from 0.18.0 to 0.18.1 (#2875)
* Bump once_cell from 1.18.0 to 1.19.0 (#2874)
* Bump rkyv from 0.7.40 to 0.7.42 (#2863)
* Bump csv from 1.2.0 to 1.3.0 (#2862)
* Bump roaring from 0.10.1 to 0.10.2 (#2865)
* Bump web-sys from 0.3.65 to 0.3.66 (#2864)
* Bump byteorder from 1.4.3 to 1.5.0 (#2866)
* Bump proptest from 1.3.1 to 1.4.0 (#2837)

src/core/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sourmash"
-version = "0.12.0"
+version = "0.12.1"
 authors = ["Luiz Irber <luiz.irber@gmail.com>"]
 description = "MinHash sketches for genomic data"
 repository = "https://github.com/sourmash-bio/sourmash"