[BUGFIX] Make valid version check more restrictive

extensions/ter/Classes/Api/ExtensionVersion.php

@@ -99,7 +99,7 @@ class ExtensionVersion
      */
     public function isValidVersionNumber(): bool
     {
-        return preg_match('/^(0|[1-9]\d{0,2})\.(0|[1-9]\d{0,2})\.(0|[1-9]\d{0,2})$/', $this->version) !== false;
+        return preg_match('/^(0|[1-9]\d{0,2})\.(0|[1-9]\d{0,2})\.(0|[1-9]\d{0,2})$/', $this->version) === 1;
         // alternative (preg_match('/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/', $version) !== false) {
     }