fixed_hash benchmark warnings

[litecreator]

warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:11:39
   |
11 | use criterion::{black_box, Criterion, ParameterizedBenchmark};
   |                                       ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(deprecated)]` on by default

warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:24:3
   |
24 |         ParameterizedBenchmark::new(
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:43:3
   |
43 |         ParameterizedBenchmark::new(
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated struct `criterion::ParameterizedBenchmark`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:72:3
   |
72 |         ParameterizedBenchmark::new(
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: use of deprecated associated function `criterion::Criterion::<M>::bench`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:22:4
   |
22 |     c.bench(
   |       ^^^^^

warning: use of deprecated associated function `criterion::Criterion::<M>::bench`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:41:4
   |
41 |     c.bench(
   |       ^^^^^

warning: use of deprecated associated function `criterion::Criterion::<M>::bench`: Please use BenchmarkGroups instead.
  --> fixed-hash/benches/cmp.rs:70:4
   |
70 |     c.bench(
   |       ^^^^^

warning: 7 warnings emitted

Running tetsy-common/target/release/deps/cmp-5b0bc5e0d3f2258e
WARNING: HTML report generation will become a non-default optional feature in Criterion.rs 0.4.0.
This feature is being moved to cargo-criterion (https://github.com/bheisler/cargo-criterion) and will be optional in a future version of Criterion.rs. To silence this warning, either switch to cargo-criterion or enable the 'html_reports' feature in your Cargo.toml.