Add ability to generate report in cobertura format

Author: arnas-oxy

README.md

@@ -94,6 +94,7 @@ extensions:
       #- clover
       #- php
       #- xml
+      #- cobertura
     #
     # Specify output file/directory where code coverage report will be
     # generated. You can configure different output file/directory per
@@ -104,6 +105,7 @@ extensions:
       #clover: coverage.xml
       #php: coverage.php
       #xml: coverage
+      #cobertura: cobertura.xml
     #
     # Should uncovered files be included in the reports?
     # Default: true
@@ -154,7 +156,7 @@ extensions:
 ### Options
 
 * `format` (optional) a list of formats in which code coverage should be
-  generated. Can be one or many of: `clover`, `php`, `text`, `html`, `xml` (default
+  generated. Can be one or many of: `clover`, `cobertura`, `crap4j`, `php`, `text`, `html`, `xml` (default
   `html`)
   **Note**: When using `clover` format option, you have to configure specific
   `output` file for the `clover` format (see below).

src/CodeCoverageExtension.php

@@ -138,6 +138,10 @@ public function load(ServiceContainer $container, array $params = []): void
                     case 'html':
                         $reports['html'] = new Report\Html\Facade();
 
+                        break;
+                    case 'cobertura':
+                        $reports['cobertura'] = new Report\Cobertura();
+
                         break;
                 }
             }