Correct phpstan error: ParsingException is never thrown

The typing of the exception had to be changed, because \Datetime throws an \Exception
instead of a ParsingException.

src/Bundle/ChillMainBundle/Search/AbstractSearch.php

@@ -32,7 +32,7 @@ abstract class AbstractSearch implements SearchInterface
     {
         try {
             return new \DateTime($string);
-        } catch (ParsingException $ex) {
+        } catch (\Exception $ex) {
             $exception = new ParsingException('The date is '
                       .'not parsable', 0, $ex);