Merge amethyst#537

537: Update rand requirement from 0.5.5 to 0.6.1 r=torkleyy a=dependabot[bot]

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
<details>
<summary>Changelog</summary>

*Sourced from [rand's changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md).*

> ## [0.6.1] - 2018-11-22
> - Support sampling `Duration` also for `no_std` (only since Rust 1.25) ([amethyst#649](https://github-redirect.dependabot.com/rust-random/rand/issues/649))
> - Disable default features of `libc` ([amethyst#647](https://github-redirect.dependabot.com/rust-random/rand/issues/647))
> 
> ## [0.6.0] - 2018-11-14
> 
> ### Project organisation
> - Rand has moved from [rust-lang-nursery](https://github.com/rust-lang-nursery/rand)
>   to [rust-random](https://github.com/rust-random/rand)! ([amethyst#578](https://github-redirect.dependabot.com/rust-random/rand/issues/578))
> - Created [The Rust Random Book](https://rust-random.github.io/book/)
>   ([source](https://github.com/rust-random/book))
> - Update copyright and licence notices ([amethyst#591](https://github-redirect.dependabot.com/rust-random/rand/issues/591), [amethyst#611](https://github-redirect.dependabot.com/rust-random/rand/issues/611))
> - Migrate policy documentation from the wiki ([amethyst#544](https://github-redirect.dependabot.com/rust-random/rand/issues/544))
> 
> ### Platforms
> - Add fork protection on Unix ([amethyst#466](https://github-redirect.dependabot.com/rust-random/rand/issues/466))
> - Added support for wasm-bindgen. ([amethyst#541](https://github-redirect.dependabot.com/rust-random/rand/issues/541), [amethyst#559](https://github-redirect.dependabot.com/rust-random/rand/issues/559), [amethyst#562](https://github-redirect.dependabot.com/rust-random/rand/issues/562), [amethyst#600](https://github-redirect.dependabot.com/rust-random/rand/issues/600))
> - Enable `OsRng` for powerpc64, sparc and sparc64 ([amethyst#609](https://github-redirect.dependabot.com/rust-random/rand/issues/609))
> - Use `syscall` from `libc` on Linux instead of redefining it ([amethyst#629](https://github-redirect.dependabot.com/rust-random/rand/issues/629))
> 
> ### RNGs
> - Switch `SmallRng` to use PCG ([amethyst#623](https://github-redirect.dependabot.com/rust-random/rand/issues/623))
> - Implement `Pcg32` and `Pcg64Mcg` generators ([amethyst#632](https://github-redirect.dependabot.com/rust-random/rand/issues/632))
> - Move ISAAC RNGs to a dedicated crate ([amethyst#551](https://github-redirect.dependabot.com/rust-random/rand/issues/551))
> - Move Xorshift RNG to its own crate ([amethyst#557](https://github-redirect.dependabot.com/rust-random/rand/issues/557))
> - Move ChaCha and HC128 RNGs to dedicated crates ([amethyst#607](https://github-redirect.dependabot.com/rust-random/rand/issues/607), [amethyst#636](https://github-redirect.dependabot.com/rust-random/rand/issues/636))
> - Remove usage of `Rc` from `ThreadRng` ([amethyst#615](https://github-redirect.dependabot.com/rust-random/rand/issues/615))
> 
> ### Sampling and distributions
> - Implement `Rng.gen_ratio()` and `Bernoulli::new_ratio()` ([amethyst#491](https://github-redirect.dependabot.com/rust-random/rand/issues/491))
> - Make `Uniform` strictly respect `f32` / `f64` high/low bounds ([amethyst#477](https://github-redirect.dependabot.com/rust-random/rand/issues/477))
> - Allow `gen_range` and `Uniform` to work on non-`Copy` types ([amethyst#506](https://github-redirect.dependabot.com/rust-random/rand/issues/506))
> - `Uniform` supports inclusive ranges: `Uniform::from(a..=b)`. This is
>   automatically enabled for Rust >= 1.27. ([amethyst#566](https://github-redirect.dependabot.com/rust-random/rand/issues/566))
> - Implement `TrustedLen` and `FusedIterator` for `DistIter` ([amethyst#620](https://github-redirect.dependabot.com/rust-random/rand/issues/620))
> 
> #### New distributions
> - Add the `Dirichlet` distribution ([amethyst#485](https://github-redirect.dependabot.com/rust-random/rand/issues/485))
> - Added sampling from the unit sphere and circle. ([amethyst#567](https://github-redirect.dependabot.com/rust-random/rand/issues/567))
> - Implement the triangular distribution ([amethyst#575](https://github-redirect.dependabot.com/rust-random/rand/issues/575))
> - Implement the Weibull distribution ([amethyst#576](https://github-redirect.dependabot.com/rust-random/rand/issues/576))
> - Implement the Beta distribution ([amethyst#574](https://github-redirect.dependabot.com/rust-random/rand/issues/574))
> 
> #### Optimisations
> 
> - Optimise `Bernoulli::new` ([amethyst#500](https://github-redirect.dependabot.com/rust-random/rand/issues/500))
> - Optimise `char` sampling ([amethyst#519](https://github-redirect.dependabot.com/rust-random/rand/issues/519))
> - Optimise sampling of `std::time::Duration` ([amethyst#583](https://github-redirect.dependabot.com/rust-random/rand/issues/583))
> 
> ### Sequences
></table> ... (truncated)
</details>
<details>
<summary>Commits</summary>

- See full diff in [compare view](https://github.com/rust-random/rand/commits/0.6.1)
</details>
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</details>



Co-authored-by: dependabot[bot] <[email protected]>
Co-authored-by: Thomas Schaller <[email protected]>

Cargo.toml

@@ -53,7 +53,7 @@ features = ["common", "serde"]
 cgmath =  { version = "0.16" }
 criterion = "0.2"
 ron = "0.4"
-rand = "0.5.5"
+rand = "0.6.1"
 serde_json = "1.0"
 specs-derive = { path = "specs-derive", version = "0.4.0" }
 

benches/world.rs

@@ -110,16 +110,15 @@ fn delete_later(b: &mut Bencher) {
 }
 
 fn create_after_delete(b: &mut Bencher) {
-    use rand::seq::sample_indices;
-    use rand::thread_rng;
+    use rand::prelude::*;
 
     let mut rng = thread_rng();
     b.iter_with_setup(
         || {
             let mut w = World::new();
             let eids: Vec<_> = (0..1000).map(|_| w.create_entity().build()).collect();
 
-            sample_indices(&mut rng, 1000, 100)
+            (0..1000).choose_multiple(&mut rng, 100)
                 .into_iter()
                 .map(|i| eids[i])
                 .for_each(|e| {

examples/cluster_bomb.rs

@@ -2,8 +2,7 @@ extern crate rand;
 extern crate rayon;
 extern crate specs;
 
-use rand::Rng;
-use rand::distributions::{Distribution, Range};
+use rand::prelude::*;
 
 use rayon::iter::ParallelIterator;
 
@@ -56,7 +55,9 @@ impl<'a> System<'a> for ClusterBombSystem {
     );
 
     fn run(&mut self, (entities, mut bombs, positions, updater): Self::SystemData) {
-        let durability_range = Range::new(10, 20);
+        use rand::distributions::{Distribution, Uniform};
+
+        let durability_range = Uniform::new(10, 20);
         // Join components in potentially parallel way using rayon.
         (&entities, &mut bombs, &positions)
             .par_join()