start moving more transformers to packages and finish import of plugins from babel-plugins

packages/babel-plugin-jscript/package.json

@@ -2,7 +2,7 @@
   "name": "babel-plugin-jscript",
   "version": "1.0.4",
   "description": "Babel plugin to fix buggy JScript named function expressions",
-  "repository": "babel-plugins/babel-plugin-jscript",
+  "repository": "babel/babelbabel-plugin-jscript",
   "license": "MIT",
   "main": "lib/index.js",
   "keywords": [

packages/babel-plugin-jscript/src/index.js

@@ -1,9 +1,9 @@
 export default function ({ Plugin, types: t }) {
-  return new Plugin("jscript", {
+  return {
     metadata: {
       group: "builtin-trailing"
     },
-    
+
     visitor: {
       FunctionExpression: {
         exit(node) {
@@ -20,5 +20,5 @@ export default function ({ Plugin, types: t }) {
         }
       }
     }
-  });
+  };
 }