users weekly stats as bar-chart in dashboard (#847)

src/Model/Statistic/Year.php

@@ -24,7 +24,6 @@ class Year
     protected $months = [];
 
     /**
-     * Year constructor.
      * @param string $year
      */
     public function __construct($year)
@@ -40,22 +39,14 @@ class Year
         return $this->year;
     }
 
-    /**
-     * @param Month $month
-     * @return $this
-     */
-    public function setMonth(Month $month)
+    public function setMonth(Month $month): Year
     {
         $this->months[(int) $month->getMonth()] = $month;
 
         return $this;
     }
 
-    /**
-     * @param int $month
-     * @return null|Month
-     */
-    public function getMonth(int $month)
+    public function getMonth(int $month): ?Month
     {
         if (isset($this->months[$month])) {
             return $this->months[$month];
@@ -67,7 +58,7 @@ class Year
     /**
      * @return Month[]
      */
-    public function getMonths()
+    public function getMonths(): array
     {
         return array_values($this->months);
     }