update aframe-loader-3dtiles-component library

src/lib/aframe-loader-3dtiles-component.min.js.LICENSE.txt

@@ -0,0 +1,19 @@
+/**
+ * @license
+ * Copyright 2009 The Closure Library Authors
+ * Copyright 2020 Daniel Wirtz / The long.js Authors.
+ *
+ * Licensed 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */