Shuffle around travis builds a bit

.travis.yml

@@ -10,6 +10,8 @@ matrix:
 
     # Tests pass on nightly
     - rust: nightly
+      before_install: rustup target add wasm32-unknown-unknown
+      script: cargo test
 
     # Dist linux binary
     - env: TARGET=x86_64-unknown-linux-musl DEPLOY=1
@@ -20,18 +22,16 @@ matrix:
     - os: osx
       env: MACOSX_DEPLOYMENT_TARGET=10.7 DEPLOY=1 TARGET=x86_64-apple-darwin
       script: cargo build --manifest-path crates/wasm-bindgen-cli/Cargo.toml --release --target $TARGET
-      before_install: brew install yarn --without-node
+      install: true
 
-install:
-  - curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.8/install.sh | bash
-  - source ~/.nvm/nvm.sh
-  - nvm install 9
-  - yarn
+    # We can build the tool on nightly
+    - rust: nightly
+      script: cargo install --debug --path crates/wasm-bindgen-cli
 
-script:
-  - rustup target add wasm32-unknown-unknown
-  - cargo test
-  - cargo install --debug --path crates/wasm-bindgen-cli
+    # All examples work
+    - rust: nightly
+      before_install: rustup target add wasm32-unknown-unknown
+      script:
         - |
           (cd examples/hello_world && sed -i 's/: "webpack-dev-server"/: "webpack"/' package.json && ./build.sh)
         - |
@@ -47,6 +47,12 @@ script:
         - |
           (cd examples/wasm-in-wasm && sed -i 's/: "webpack-dev-server"/: "webpack"/' package.json && ./build.sh)
 
+install:
+  - curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.33.8/install.sh | bash
+  - source ~/.nvm/nvm.sh
+  - nvm install 9
+  - yarn
+
 notifications:
   email:
     on_success: never