update eslint-config, fixes, add commands (#4721)

* update eslint-config, fixes, add commands

* switch plugin

packages/babel-cli/src/babel-doctor/rules/deduped.js

@@ -1,4 +1,4 @@
-export default async function (packages) { // eslint-disable-line require-yield
+export default async function (packages) {
   let foundDeps = {};
   let foundDuplicated = false;
   let duplicatedPackages = {};

packages/babel-cli/src/babel-doctor/rules/has-config.js

@@ -1,7 +1,7 @@
 import path from "path";
 import fs from "fs";
 
-export default async function () { // eslint-disable-line require-yield
+export default async function () {
   let cwd = process.cwd();
   let parts = cwd.split(path.sep);