Make sure CI tests serde stuff

Author: UserAB1236872

.travis.yml

@@ -18,6 +18,7 @@ matrix:
         - cargo doc --no-deps --features nightly
 script:
   - cargo test
+  - cargo test --features serde-1
   - cargo test --manifest-path rand-derive/Cargo.toml
 after_success:
   - travis-cargo --only nightly doc-upload

appveyor.yml

@@ -33,5 +33,6 @@ build: false
 
 test_script:
   - cargo test
+  - cargo test --features serde-1
   - cargo test --features nightly
   - cargo test --manifest-path rand-derive/Cargo.toml