Update README.md with tests coverage for CI status [ci skip]

README.md

@@ -14,11 +14,19 @@
 -----------|-----------------|-----------------|-----------------|-----------------|------------
 **develop**| [![AppVeyor](https://ci.appveyor.com/api/projects/status/w4k19d8io2af168h/branch/develop?svg=true)](https://ci.appveyor.com/project/stefanseefeld/gil/branch/develop) | [![Azure](https://dev.azure.com/boostorg/gil/_apis/build/status/boostorg.gil?branchName=develop)](https://dev.azure.com/boostorg/gil/_build/latest?definitionId=4?branchName=develop) | [![Travis](https://travis-ci.org/boostorg/gil.svg?branch=develop)](https://travis-ci.org/boostorg/gil) | [![CircleCI](https://circleci.com/gh/boostorg/gil/tree/develop.svg?style=shield)](https://circleci.com/gh/boostorg/workflows/gil/tree/develop) | [![gil](https://img.shields.io/badge/gil-develop-blue.svg)](http://www.boost.org/development/tests/develop/developer/gil.html)
 **master** | [![AppVeyor](https://ci.appveyor.com/api/projects/status/w4k19d8io2af168h?svg=true)](https://ci.appveyor.com/project/stefanseefeld/gil/branch/master) | [![Azure](https://dev.azure.com/boostorg/gil/_apis/build/status/boostorg.gil?branchName=master)](https://dev.azure.com/boostorg/gil/_build/latest?definitionId=4?branchName=master) | [![Travis](https://travis-ci.org/boostorg/gil.svg?branch=master)](https://travis-ci.org/boostorg/gil) | [![CircleCI](https://circleci.com/gh/boostorg/gil/tree/master.svg?style=shield)](https://circleci.com/gh/boostorg/workflows/gil/tree/master) | [![gil](https://img.shields.io/badge/gil-master-blue.svg)](http://www.boost.org/development/tests/master/developer/gil.html)
- msvc++    | VS2017 | VS2017, VS2015 |   |   |
- clang     |   | Xcode 9.4.1 | 3.9, 5.0, Xcode 9.4.1 | 3.9, 4.0, 5.0 |
- gcc       |   | 5.4, 8.1 | 5.5, 6.5, 7.4 | 4.8-9, 5.1-5, 6.1-4, 7.1-3, 8.2 |
  C++       | 14, 17 | 11, 14, 17 | 11 | 11 |
- <br />    | Boost.Build, CMake | CMake, Boost 1.68 | Boost.Build, UBSan | Boost.Build |
+ **compilers:** |
+ msvc++    | VS2017 | VS2017, VS2015 |   |   |
+ clang++   |   | Xcode 9.4.1 | 3.9, 5.0, Xcode 9.4.1 | 3.9, 4.0, 5.0 |
+ g++       |   | 5.4, 8.1 | 5.5, 6.5, 7.4 | 4.8-9, 5.1-5, 6.1-4, 7.1-3, 8.2 |
+ **tests coverage:** |
+core + conepts      | Y | Y | Y | Y |
+headers    | core + ext | core + ext | core + ext | core + ext |
+ext/dynamic_image|   |   |   |   |
+ext/io     | simple |  | simple | simple |
+ext/numeric| Y | Y | Y | Y |
+ext/toolbox| Y | Y | Y | Y |
+ **build config:** | Boost.Build, CMake | CMake | Boost.Build, UBSan | Boost.Build |
 
 # Boost.GIL