Update rand requirement from 0.7 to 0.8

[dependabot]

Updates the requirements on rand to permit the latest version.

Changelog

Sourced from rand's changelog.

[0.8.0] - 2020-12-18

Platform support

• The minimum supported Rust version is now 1.36 (#1011)
• getrandom updated to v0.2 (#1041)
• Remove wasm-bindgen and stdweb feature flags. For details of WASM support, see the getrandom documentation. (#948)
• ReadRng::next_u32 and next_u64 now use little-Endian conversion instead of native-Endian, affecting results on Big-Endian platforms (#1061)
• The nightly feature no longer implies the simd_support feature (#1048)
• Fix simd_support feature to work on current nightlies (#1056)

Rngs

• ThreadRng is no longer Copy to enable safe usage within thread-local destructors (#1035)
• gen_range(a, b) was replaced with gen_range(a..b). gen_range(a..=b) is also supported. Note that a and b can no longer be references or SIMD types. (#744, #1003)
• Replace AsByteSliceMut with Fill and add support for [bool], [char], [f32], [f64] (#940)
• Restrict rand::rngs::adapter to std (#1027; see also #928)
• StdRng: add new std_rng feature flag (enabled by default, but might need to be used if disabling default crate features) (#948)
• StdRng: Switch from ChaCha20 to ChaCha12 for better performance (#1028)
• SmallRng: Replace PCG algorithm with xoshiro{128,256}++ (#1038)

Sequences

• Add IteratorRandom::choose_stable as an alternative to choose which does not depend on size hints (#1057)
• Improve accuracy and performance of IteratorRandom::choose (#1059)
• Implement IntoIterator for IndexVec, replacing the into_iter method (#1007)
• Add value stability tests for seq module (#933)

Misc

• Support PartialEq and Eq for StdRng, SmallRng and StepRng (#979)
• Added a serde1 feature and added Serialize/Deserialize to UniformInt and WeightedIndex (#974)
• Drop some unsafe code (#962, #963, #1011)
• Reduce packaged crate size (#983)
• Migrate to GitHub Actions from Travis+AppVeyor (#1073)

Distributions

• Alphanumeric samples bytes instead of chars (#935)
• Uniform now supports char, enabling rng.gen_range('A'..='Z') (#1068)
• Add UniformSampler::sample_single_inclusive (#1003)

Weighted sampling

• Implement weighted sampling without replacement (#976, #1013)
• rand::distributions::alias_method::WeightedIndex was moved to rand_distr::WeightedAliasIndex. The simpler alternative rand::distribution::WeightedIndex remains. (#945)
• Improve treatment of rounding errors in WeightedIndex::update_weights (#956)
• WeightedIndex: return error on NaN instead of panic (#1005)

Documentation

• Document types supported by random (#994)

... (truncated)

Commits

• 98a1aaf Merge pull request #1076 from dhardy/work
• 46082d5 Fix installation of multilib
• d109f18 Update changelog for rand v0.8
• cc93dae Merge pull request #1079 from JJPennington/master
• 9aa8bc1 Modified the StdRng documentation
• 34423a6 Use cp to create redirect
• d4b180d Merge pull request #1078 from rust-random/work2
• 1959b1a Adjust homepage to point at the book
• e9adf45 Switch documentation links to docs.rs
• da3458b Add HTML redirect
• Additional commits viewable in compare view

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[commial]

@dependabot rebase

[commial]

This might be an issue, as, from https://rust-random.github.io/book/update-0.8.html:

The minimum supported Linux kernel version is now 2.6.32.

Windows XP and stdweb are, as of getrandom version 0.2.1, no longer supported

[Borber]

So is there a way to upgrade from 0.7 to 0.8?

[commial]

Actually, the libstd has now dropped some of the aforementioned support. In addition, getrandom seems to be on its way for integration in main Rust.

So, as long as MLA uses std, it could be considered working only on libstd supported platform.
Thus, this crate can be updated.

In a possible future no-std version, MLA could take the random seed as input, for instance in the MLAWriterConfig instanciation.

Ref:

• https://doc.rust-lang.org/nightly/rustc/platform-support.html

  • kernel 2.6.32+
  • Windows7+

• Drop official support for Windows XP rust-lang/compiler-team#378

• Use getrandom for generating HashMap seed rust-lang/rust#80149

[commial]

Unfortunately, it seems that as long as #70 cannot be updated due to dependencies of dependencies version, this PR cannot land.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.