Update pepakriz/phpstan-exception-rules requirement

Updates the requirements on pepakriz/phpstan-exception-rules to permit the latest version.

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -25,7 +25,7 @@
         "mockery/mockery": "^1.4.2",
         "phpstan/phpstan": "^0.12.55",
         "phpstan/phpstan-strict-rules": "^0.12.9",
-        "pepakriz/phpstan-exception-rules": "^0.11.2",
+        "pepakriz/phpstan-exception-rules": "^0.11.6",
         "phpstan/phpstan-nette": "^0.12.10",
         "nepada/phpstan-nette-tester": "^0.3.1",
         "spaze/phpstan-disallowed-calls": "^1.3.0",