Update AUTHORS
Update AUTHORS

Former-commit-id: 797b50dc530e41f86628adb2c2a8699f30ed119b [formerly 74a8b018f94200890a96985cbcff35316be2bef2]
Former-commit-id: 13414ad87ad9dffae47c65313bfee7d61d76b5a1
westpa/westpa