fix(chord): add missing export entry for chord chart

Author: plainheart

package.json

@@ -160,6 +160,7 @@
     "./lib/chart/bar": "./lib/chart/bar.js",
     "./lib/chart/boxplot": "./lib/chart/boxplot.js",
     "./lib/chart/candlestick": "./lib/chart/candlestick.js",
+    "./lib/chart/chord": "./lib/chart/chord.js",
     "./lib/chart/custom": "./lib/chart/custom.js",
     "./lib/chart/effectScatter": "./lib/chart/effectScatter.js",
     "./lib/chart/funnel": "./lib/chart/funnel.js",

src/chart/chord.ts

@@ -0,0 +1,24 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* 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 CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+import { use } from '../extension';
+import { install } from './chord/install';
+
+use(install);
+