Start running CI tests on Rust beta

We'll graduate these to stable once 1.30.0 is released, but for now
let's start testing beta! Some matrix entries remain on nightly, but the
bulk of tests are switching to beta.

.cargo/config

@@ -1,4 +1,4 @@
 # TODO: we shouldn't check this in to git, need to figure out how to avoid doing
 # that.
 [target.wasm32-unknown-unknown]
-runner = 'cargo +nightly run -p wasm-bindgen-cli --bin wasm-bindgen-test-runner --'
+runner = 'cargo run -p wasm-bindgen-cli --bin wasm-bindgen-test-runner --'

.travis.yml

@@ -49,8 +49,8 @@ INSTALL_AWS: &INSTALL_AWS
 
 matrix:
   include:
-    # Tests pass on nightly
-    - rust: nightly
+    # Tests for wasm-bindgen itself pass
+    - rust: beta
       env: JOB=test-bindgen
       install:
         - *INSTALL_NODE_VIA_NVM
@@ -62,7 +62,6 @@ matrix:
         - cargo test
         # Run the main body of the test suite
         - cargo test --target wasm32-unknown-unknown
-        - cargo test --target wasm32-unknown-unknown --features nightly
         # Rerun the test suite but disable `--debug` in generated JS
         - WASM_BINDGEN_NO_DEBUG=1 cargo test --target wasm32-unknown-unknown
         # Make sure our serde tests work
@@ -76,6 +75,15 @@ matrix:
         firefox: latest
       if: branch = master
 
+    # Tests the `nightly` feature of wasm-bindgen
+    - rust: nightly
+      env: JOB=test-bindgen-nightly
+      install:
+        - *INSTALL_NODE_VIA_NVM
+      script:
+        - cargo test --target wasm32-unknown-unknown --features nightly --test wasm
+      if: branch = master
+
     # All examples work
     - rust: nightly
       env: JOB=examples-build
@@ -95,8 +103,8 @@ matrix:
         - if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then aws s3 sync --quiet ~/$TRAVIS_BUILD_NUMBER s3://wasm-bindgen-ci/$TRAVIS_BUILD_NUMBER; fi
       if: branch = master
 
-    # The `web-sys` crate's tests pass on nightly.
-    - rust: nightly
+    # The `web-sys` crate's tests pass
+    - rust: beta
       env: JOB=test-web-sys
       install:
         - *INSTALL_NODE_VIA_NVM
@@ -118,8 +126,8 @@ matrix:
         chrome: stable
       if: branch = master
 
-    # The `js-sys` crate's tests pass on nightly.
-    - rust: nightly
+    # The `js-sys` crate's tests pass
+    - rust: beta
       env: JOB=test-js-sys
       install:
         - *INSTALL_NODE_VIA_NVM
@@ -134,8 +142,8 @@ matrix:
         chrome: stable
       if: branch = master
 
-    # WebIDL tests pass on nightly
-    - rust: nightly
+    # WebIDL tests pass
+    - rust: beta
       env: JOB=test-webidl
       install: *INSTALL_NODE_VIA_NVM
       script:
@@ -172,14 +180,9 @@ matrix:
       env: JOB=check-stable-cli
       script: cargo check --manifest-path crates/cli/Cargo.toml
       if: branch = master
-    # CLI builds on nightly
-    - rust: nightly
-      env: JOB=check-nightly-cli
-      script: cargo check --manifest-path crates/cli/Cargo.toml
-      if: branch = master
 
     # Build mdbook documentation
-    - rust: nightly
+    - rust: stable
       env: JOB=guide-build
       install:
         - mkdir -p $HOME/mdbook