Release 2.0.18 (#4003)

* prevent too long values for user preferences
* add chart value 0 to y-axis if last value > 0, to always display the zero line (project details)
* add user-preferences to invoice hydrator
* DateTime vs DateTimeInterface
* simplify permission config
* fix query for teamleads limiting to only selected teams not possible

symfony.lock

@@ -225,9 +225,6 @@
     "phar-io/version": {
         "version": "1.0.1"
     },
-    "php-http/message-factory": {
-        "version": "v1.0.2"
-    },
     "phpdocumentor/reflection-common": {
         "version": "1.0.1"
     },