Change return type to static in PendingMetric methods

This change allows type hints to work correctly when extending PendingMetric to add custom functions (especially useful if also using custom Metric models)

Author: rhurling

src/PendingMetric.php

@@ -56,15 +56,15 @@ public function __construct(BackedEnum|string $name)
     /**
      * Create a new pending metric.
      */
-    public static function make(BackedEnum|string $name): self
+    public static function make(BackedEnum|string $name): static
     {
-        return new self($name);
+        return new static($name);
     }
 
     /**
      * Set the category of the metric.
      */
-    public function category(BackedEnum|string|null $category): self
+    public function category(BackedEnum|string|null $category): static
     {
         $this->category = $category;
 
@@ -74,7 +74,7 @@ public function category(BackedEnum|string|null $category): self
     /**
      * Set the date of the metric.
      */
-    public function date(CarbonInterface $date): self
+    public function date(CarbonInterface $date): static
     {
         $this->date = $date;
 
@@ -84,7 +84,7 @@ public function date(CarbonInterface $date): self
     /**
      * Set the measurable model of the metric.
      */
-    public function measurable(Model $measurable): self
+    public function measurable(Model $measurable): static
     {
         $this->measurable = $measurable;
 
@@ -94,7 +94,7 @@ public function measurable(Model $measurable): self
     /**
      * Set the metric model to use.
      */
-    public function model(string $model): self
+    public function model(string $model): static
     {
         $this->model = $model;
 
@@ -104,7 +104,7 @@ public function model(string $model): self
     /**
      * Enable hourly tracking for the metric.
      */
-    public function hourly(): self
+    public function hourly(): static
     {
         $this->trackHourly = true;
 
@@ -116,7 +116,7 @@ public function hourly(): self
      *
      * @param  array<string, mixed>  $attributes
      */
-    public function with(array $attributes): self
+    public function with(array $attributes): static
     {
         $this->additional = $attributes;