Set git user for unit test

Author: t0mmie

tests/Naneau/ProjectVersioner/Test/Reader/GitExecTest.php

@@ -61,7 +61,9 @@ public function setUp(): void
         self::execWithDir(['rm -rf %s', 'mkdir %s']);
         self::execInDir([
             'touch testfile',
-            'git init'
+            'git init',
+            'git config user.email "php@unit.test"',
+            'git config user.name "PHPUnit"'
         ]);
 
         // Add commits, with matching tags