fix(base): add re-export of lit/directive.js (#3616)

* fix(base): add re-export of lit/directive.js

tools/base/exports.json

@@ -3,6 +3,7 @@
     "./condition-attribute-with-id.js": "./src/condition-attribute-with-id.js",
     "./decorators.js": "./src/decorators.js",
     "./directives.js": "./src/directives.js",
+    "./directive.js": "./src/directive.js",
     "./html.js": "./src/html.js",
     "./streaming-listener.js": "./src/streaming-listener.js"
 }

tools/base/package.json

@@ -41,6 +41,10 @@
             "development": "./src/define-element.dev.js",
             "default": "./src/define-element.js"
         },
+        "./src/directive.js": {
+            "development": "./src/directive.dev.js",
+            "default": "./src/directive.js"
+        },
         "./src/directives.js": {
             "development": "./src/directives.dev.js",
             "default": "./src/directives.js"
@@ -73,6 +77,10 @@
             "development": "./directives.dev.js",
             "default": "./directives.js"
         },
+        "./directive.js": {
+            "development": "./directive.dev.js",
+            "default": "./directive.js"
+        },
         "./html.js": {
             "development": "./html.dev.js",
             "default": "./html.js"

tools/base/src/directive.ts

@@ -0,0 +1,13 @@
+/*
+Copyright 2020 Adobe. All rights reserved.
+This file is licensed to you under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License. You may obtain a copy
+of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software distributed under
+the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
+OF ANY KIND, either express or implied. See the License for the specific language
+governing permissions and limitations under the License.
+*/
+
+export * from 'lit/directive.js';