Added CI/test/dependency badges.

Author: Lastique

README.md

@@ -16,6 +16,13 @@ Section 3.3 Scope guard support \[scopeguard\]. The implementation also provides
 * [Report bugs](https://github.com/boostorg/scope/issues/new). Be sure to mention Boost version, platform and compiler you're using. A small compilable code sample to reproduce the problem is always good as well.
 * Submit your patches as [pull requests](https://github.com/boostorg/scope/compare) against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).
 
+### Build status
+
+Branch          | GitHub Actions| Test Matrix | Dependencies |
+:-------------: | --------------| ----------- | ------------ |
+[`master`](https://github.com/boostorg/scope/tree/master) | [![GitHub Actions](https://github.com/boostorg/scope/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/scope/actions?query=branch%3Amaster) | [![Tests](https://img.shields.io/badge/matrix-master-brightgreen.svg)](http://www.boost.org/development/tests/master/developer/scope.html) | [![Dependencies](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/scope.html)
+[`develop`](https://github.com/boostorg/scope/tree/develop) | [![GitHub Actions](https://github.com/boostorg/scope/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/scope/actions?query=branch%3Adevelop) | [![Tests](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](http://www.boost.org/development/tests/develop/developer/scope.html) | [![Dependencies](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/scope.html)
+
 ### License
 
 Distributed under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).