minor #3973 Bump xdebug-handler (keradus)

This PR was merged into the 2.12 branch.

Discussion
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Bump xdebug-handler

Fixes #3901

Commits
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fb41dff Bump xdebug-handler

composer.json

@@ -18,7 +18,7 @@
         "ext-json": "*",
         "ext-tokenizer": "*",
         "composer/semver": "^1.4",
-        "composer/xdebug-handler": "^1.0",
+        "composer/xdebug-handler": "^1.2",
         "doctrine/annotations": "^1.2",
         "php-cs-fixer/diff": "^1.3",
         "symfony/console": "^3.2 || ^4.0",