sp-dev-fx-webparts/samples/react-page-navigator/gulpfile.js

const build = require('@microsoft/sp-build-web');

build.addSuppression(`Warning - [sass] The local CSS class 'ms-Grid' is not camelCase and will not be type-safe.`);

var getTasks = build.rig.getTasks;
build.rig.getTasks = function () {
    var result = getTasks.call(build.rig);

    result.set('serve', result.get('serve-deprecated'));

    return result;
};

// ********* ADDED *******
// disable tslint
build.tslintCmd.enabled = false;
// ********* ADDED *******

build.initialize(require('gulp'));