My software depends on and links to a third-party open-source library licensed under the MIT license. No copyright notice is present in the LICENSE file, the README file, or any of the source files. However, my understanding is that all contributors to such projects are copyright holders, and that the MIT license requires reproduction of its copyright notice even if it's implicit.
How might I provide attribution to such a third-party library? Would it be sufficient to have a copyright notice like "Copyright (c) the CoolLibrary contributors" or would I need to list out every contributor individually even when there are dozens (or more) of them?