fixup places that aren not scoped [skip ci] (#6646)

packages/babel-plugin-proposal-unicode-property-regex/src/index.js

@@ -1,5 +1,5 @@
 import rewritePattern from "regexpu-core";
-import * as regex from "babel-helper-regex";
+import * as regex from "@babel/helper-regex";
 
 export default function() {
   return {

packages/babel-template/README.md

@@ -49,9 +49,9 @@ which will parse and return the AST directly.
 ## Template Literal Usage
 
 ```js
-import template from "babel-template";
-import generate from "babel-generator";
-import * as t from "babel-types";
+import template from "@babel/template";
+import generate from "@babel/generator";
+import * as t from "@babel/types";
 
 const fn = template`
   var IMPORT_NAME = require('${"my-module"}');

packages/babel-template/test/index.js

@@ -1,7 +1,7 @@
 import generator from "../../babel-generator";
 import template from "../lib";
 import { expect } from "chai";
-import * as t from "babel-types";
+import * as t from "@babel/types";
 
 const comments = "// Sum two numbers\nconst add = (a, b) => a + b;";