Update core_arch to latest git version

Author: GabrielMajeri

Cargo.toml

@@ -22,7 +22,7 @@ maintenance = { status = "experimental" }
 
 [dependencies]
 cfg-if = "0.1.10"
-core_arch = { version = "0.1.5", optional = true }
+core_arch = { git = "https://github.com/rust-lang/stdarch", optional = true }
 libm = "0.1.4"
 
 [features]

examples/mandelbrot/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2018"
 packed_simd = { path = "../.." }
 rayon = "^1.0"
 ispc = { version = "^1.0.4", optional = true }
-structopt = "0.3.0"
+structopt = { version = "0.3.0", features = ["color"] }
 
 [build-dependencies]
 ispc = { version = "^1.0.4", optional = true }

examples/mandelbrot/src/main.rs

@@ -12,7 +12,6 @@ use structopt::StructOpt;
 ///
 /// Output is printed to `stdout`.
 #[derive(StructOpt)]
-#[structopt(raw(setting = "structopt::clap::AppSettings::ColoredHelp"))]
 struct Opt {
     /// Image width.
     width: usize,