fix(phpstan): php's type system can't express this case

Author: tpetry

src/Schema/Concerns/ZeroDowntimeMigration.php

@@ -11,9 +11,11 @@ trait ZeroDowntimeMigration
      */
     public function timeoutDown(): float
     {
+        // @phpstan-ignore function.impossibleType
         if (property_exists($this, 'timeoutDown')) {
             return (float) $this->timeoutDown;
         }
+        // @phpstan-ignore function.impossibleType
         if (property_exists($this, 'timeout')) {
             return (float) $this->timeout;
         }
@@ -26,9 +28,11 @@ public function timeoutDown(): float
      */
     public function timeoutUp(): float
     {
+        // @phpstan-ignore function.impossibleType
         if (property_exists($this, 'timeoutUp')) {
             return (float) $this->timeoutUp;
         }
+        // @phpstan-ignore function.impossibleType
         if (property_exists($this, 'timeout')) {
             return (float) $this->timeout;
         }