message: Adjust Travis-CI config to build with and without `rand`
diff: @@ -9,7 +9,7 @@ cache: cargo
  env:
  - CARGO_FEATURES=""
  - - CARGO_FEATURES="mint serde"
  + - CARGO_FEATURES="mint serde rand"
  matrix:
  include:
  @@ -21,8 +21,8 @@ matrix:
  - rust: nightly
  script:
  - - cargo build --features "$CARGO_FEATURES"
  - - cargo test --features "$CARGO_FEATURES"
  + - cargo build --no-default-features --features "$CARGO_FEATURES"
  + - cargo test --no-default-features --features "$CARGO_FEATURES"
  - |
  if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
  cargo bench --features "$CARGO_FEATURES"
  