Update rand requirement from 0.7.3 to 0.8.5

[dependabot[bot]]

Updates the requirements on rand to permit the latest version.

Changelog

Sourced from rand's changelog.

[0.8.5] - 2021-08-20

Fixes

• Fix build on non-32/64-bit architectures (#1144)
• Fix "min_const_gen" feature for no_std (#1173)
• Check libc::pthread_atfork return value with panic on error (#1178)
• More robust reseeding in case ReseedingRng is used from a fork handler (#1178)
• Fix nightly: remove unused slice_partition_at_index feature (#1215)
• Fix nightly + simd_support: update packed_simd (#1216)

Rngs

• StdRng: Switch from HC128 to ChaCha12 on emscripten (#1142). We now use ChaCha12 on all platforms.

Documentation

• Added docs about rand's use of const generics (#1150)
• Better random chars example (#1157)

[0.8.4] - 2021-06-15

Additions

• Use const-generics to support arrays of all sizes (#1104)
• Implement Clone and Copy for Alphanumeric (#1126)
• Add Distribution::map to derive a distribution using a closure (#1129)
• Add Slice distribution (#1107)
• Add DistString trait with impls for Standard and Alphanumeric (#1133)

Other

• Reorder asserts in Uniform float distributions for easier debugging of non-finite arguments (#1094, #1108)
• Add range overflow check in Uniform float distributions (#1108)
• Deprecate rngs::adapter::ReadRng (#1130)

[0.8.3] - 2021-01-25

Fixes

• Fix no-std + alloc build by gating choose_multiple_weighted on std (#1088)

[0.8.2] - 2021-01-12

Fixes

• Fix panic in UniformInt::sample_single_inclusive and Rng::gen_range when providing a full integer range (eg 0..=MAX) (#1087)

[0.8.1] - 2020-12-31

Other

• Enable all stable features in the playground (#1081)

[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,

... (truncated)

Commits

• 937320c Update CHANGELOG for 0.8.5 (#1221)
• 2924af6 Merge pull request #1183 from vks/fill-float-doc
• dbbc1bf Merge pull request #1218 from Will-Low/master
• 9f20df0 Making distributions comparable by deriving PartialEq. Tests included
• a407bdf Merge pull request #1216 from rust-random/work5
• d3ca11b Update to packed_simd_2 0.3.7
• fa04c15 Merge pull request #1215 from Lantern-chat/master
• 73f8ffd Remove unused slice_partition_at_index feature
• 8f37250 Merge pull request #1208 from newpavlov/rand_distr/fix_no_std
• 9ef737b update changelog
• Additional commits viewable in compare view

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