Hi there,
I've just upgraded from v24.3.0 to v25.0.0 with npm i grunt-eslint@25.0.0. This pulls in the tgz from registry.npmjs.org (with hash sha512-JIV5IPgOuacorFLmYtUTq0n+0qGIL9FSQJ4KVnNfCg/8Fm+K1t6OWrzXXI8TxWTwq2K9E3parFVXCpn1sGLbKQ==), but that archive is only 2.5k zipped and contains just 4 files.
The file for download from the Github releases package is 50k zipped with a sha512sum of 591c37fccae5365d8e82d9738de855ce7ce2a60928802cdff46225b28727faca227245fdfb5fdc66ce9bf2189d309d582ab0eb7cdf984af7fb68a665aa092bef.
Because conf/eslint.js is missing from the npm archive, eslint cannot find the config file and an error occurs.
Can you re-upload the package or bump the version?