[5.5] Route::middleware doesn't accept arrays

[sebastiandedeyne]

• Laravel Version: 5.5
• PHP Version: Any

Description:

Calling middleware statically behaves differently than chaining the method.

When digging into the source this makes sense looking at the implementation, but can be very confusing in usage + the error is silent.

Steps To Reproduce:

Route::middleware('foo', 'bar')->get('/'); // Only 'foo' is registered
Route::get('/')->middleware('foo', 'bar'); // Both middlewares are registered

[themsaid]

Submitted a PR to allow this to work at #21621