Add plugins name (#8769)

* Add plugins name

* Add missing names found by the plugin

* Add eslint plugin

packages/babel-plugin-transform-classes/src/index.js

@@ -25,6 +25,8 @@ export default declare((api, options) => {
   const VISITED = Symbol();
 
   return {
+    name: "transform-classes",
+
     visitor: {
       ExportDefaultDeclaration(path: NodePath) {
         if (!path.get("declaration").isClassDeclaration()) return;