bug #3262 ToolInfo - support installation by branch as well (keradus)

This PR was merged into the 2.2 branch.

Discussion
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ToolInfo - support installation by branch as well

when installed as branch, eg `dev-master`, then there is no `dist` key in array, resulting in app crash

Commits
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154c457f ToolInfo - support installation by branch as well

src/ToolInfo.php

@@ -62,7 +62,13 @@ final class ToolInfo implements ToolInfoInterface
     {
         $package = $this->getComposerInstallationDetails();
 
-        return $package['version'].'#'.$package['dist']['reference'];
+        $versionSuffix = '';
+
+        if (isset($package['dist'])) {
+            $versionSuffix = '#'.$package['dist']['reference'];
+        }
+
+        return $package['version'].$versionSuffix;
     }
 
     public function getVersion()