Update vulkano and shaderc deps to fix Linux build issues

This fixes an issue where some Linux distros (Arch, Void, possibly
others) are unable to build 0.5.1. 0.6.1 includes the fix, hence the
update.

Merge pending freesig/shade_runner#21.

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Unreleased
 
+- Update vulkano and shaderc dependencies to fix linux build issues.
 - Add an example that demonstrates using the Draw API with multiple windows.
 - Fix a bug where `Draw::to_frame` would `panic!` when used between multiple
   windows.

Cargo.toml

@@ -16,9 +16,9 @@ default = ["notosans"]
 [dependencies]
 approx = "0.1"
 cgmath = { version = "0.16", features = ["serde"] }
-conrod_core = "0.66"
-conrod_winit = "0.66"
-conrod_vulkano = "0.66"
+conrod_core = "0.67"
+conrod_winit = "0.67"
+conrod_vulkano = "0.67"
 daggy = "0.6"
 find_folder = "0.3"
 image = "0.21"
@@ -32,9 +32,9 @@ serde = "1"
 serde_derive = "1"
 serde_json = "1"
 toml = "0.4"
-vulkano = "0.13"
-vulkano-win = "0.13"
-vulkano-shaders = "0.13"
+vulkano = "0.14"
+vulkano-win = "0.14"
+vulkano-shaders = "0.14"
 walkdir = "2"
 winit = "0.19"
 
@@ -43,7 +43,8 @@ audrey = "0.2"
 nannou_audio = "0.2"
 nannou_laser = "0.3"
 nannou_osc = "0.1"
-shade_runner = "0.1"
+shade_runner = { git = "https://github.com/mitchmindtree/shade_runner", branch = "update_vulkano" }
+#shade_runner = "0.2"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 moltenvk_deps = "0.1"