Bump rand_core from 0.6.1 to 0.6.2

[dependabot[bot]]

Bumps rand_core from 0.6.1 to 0.6.2.

Changelog

Sourced from rand_core's changelog.

[0.6.2] - 2019-01-04

Additions

• Add Default for ThreadRng (#657)
• Move rngs::OsRng to rand_os sub-crate; clean up code; use as dependency (#643) ##BLOCKER##
• Add rand_xoshiro sub-crate, plus benchmarks (#642, #668)

Fixes

• Fix bias in UniformInt::sample_single (#662)
• Use autocfg instead of rustc_version for rustc version detection (#664)
• Disable i128 and u128 if the target_os is emscripten (#671: work-around Emscripten limitation)
• CI fixes (#660, #671)

Optimisations

• Optimise memory usage of UnitCircle and UnitSphereSurface distributions (no PR)

Commits

• 3a03c9e Merge pull request #1096 from tmandry/patch-1
• 2cf5120 Bump to 0.6.2
• 390a7b1 Fix assertions inside read_{u32,u64}_into
• 6ecbe26 Merge pull request #1089 from dhardy/work
• 8821743 Prepare 0.8.3
• fa615ef Feature gate choose_multiple_weighted on std
• 22dec87 CI: more accurate no-default-feature and nightly test targets
• 6a6b9fd Merge pull request #1087 from GautierMinster/fix_uniform_int_panic_on_full_in...
• 2c9085a Bump to 0.8.2 and update changelog
• 4e8c7a4 distributions/uniform: fix panic in gen_range(0..=MAX)
• See full diff in compare view

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[dependabot[bot]]

A newer version of rand_core exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.