mixins/rl-dropdown-component: Use array spread operator for this._super() call
mixins/rl-dropdown-component: Use array spread operator for this._super() call

rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,steveklabnik/crates.io,steveklabnik/crates.io,rust-lang/crates.io,steveklabnik/crates.io,steveklabnik/crates.io