Merge #627

627: Use stable toolchain r=matklad a=kjeremy

Fixes #622 

Co-authored-by: Jeremy Kolb <kjeremy@gmail.com>

.travis.yml

@@ -6,7 +6,7 @@ before_cache:
 
 build: &rust_build
     language: rust
-    rust: 1.32.0
+    rust: stable
     script:
         - rustup component add rustfmt
         - rustup component add rust-src

crates/tools/src/lib.rs

@@ -15,7 +15,7 @@
 pub const GRAMMAR: &str = "crates/ra_syntax/src/grammar.ron";
 pub const SYNTAX_KINDS: &str = "crates/ra_syntax/src/syntax_kinds/generated.rs.tera";
 pub const AST: &str = "crates/ra_syntax/src/ast/generated.rs.tera";
-const TOOLCHAIN: &str = "1.32.0";
+const TOOLCHAIN: &str = "stable";
 
 #[derive(Debug)]
 pub struct Test {