Merge #115

115: CI: test on beta r=therealprof a=japaric

also recommend readers to use the beta channel

r? @rust-embedded/resources (anyone)

Co-authored-by: Jorge Aparicio <[email protected]>

Author: bors[bot]

.travis.yml

@@ -1,5 +1,5 @@
 language: rust
-rust: nightly
+rust: beta
 
 install:
   - bash ci/install.sh

src/03-setup/README.md

@@ -67,18 +67,18 @@ Next, follow OS-agnostic installation instructions for a few of the tools:
 
 Install rustup by following the instructions at [https://rustup.rs](https://rustup.rs).
 
-Then, install or switch to the nightly channel.
+Then, install or switch to the beta channel.
 
 ``` console
-$ rustup default nightly
+$ rustup default beta
 ```
 
-**NOTE** Make sure you have a nightly newer than `nightly-2018-09-13`. `rustc -V` should return a
-date newer than the one shown below:
+**NOTE** Make sure you have a toolchain newer than `1.30-beta.1`. `rustc -V`
+should return a date newer than the one shown below:
 
 ``` console
 $ rustc -V
-rustc 1.30.0-nightly (f2302daef 2018-09-12)
+rustc 1.30.0-beta.1 (14f51b05d 2018-09-18)
 ```
 
 ### `itmdump`

src/11-usart/Cargo.toml

@@ -6,4 +6,7 @@ version = "0.1.0"
 
 [dependencies]
 aux11 = { path = "auxiliary" }
-heapless = "0.3.6"
+
+[dependencies.heapless]
+default-features = false
+version = "0.3.7"