Update README.md

Author: JavierSegoviaCordoba

README.md

@@ -416,3 +416,21 @@ semver: 1.0.1
 ./gradlew "-Psemver.checkClean=false"
 semver: 1.0.0.23+1a2cd5b2 # 1a2cd5b2 is the last commit hash
 ```
+
+## License
+
+```
+Copyright 2022 Javier Segovia Córdoba
+
+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
+
+   https://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.
+```