Fix TextBox line height type (#34)

* Fix TextBox line height type

\Intervention\Image\Typography\FontFactory lets you call `lineHeight`
with a float for more line height options. Currently, the package
only lets you provide a custom line height as an int.

Since the default value is 1.6, this fix lets you set it to e.g. 1.8,
which may be better if you are using a custom font or want to have
more granular control over the layout that is being rendered.

* Add PHP 8.4 to test matrix

Author: nicoverbruggen

.github/workflows/run-tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [8.2, 8.3]
+        php: [8.2, 8.3, 8.4]
         stability: [prefer-lowest, prefer-stable]
 
     name: PHP ${{ matrix.php }} - ${{ matrix.stability }}

src/Layout/TextBox.php

@@ -20,7 +20,7 @@ class TextBox extends Box
     public ColorInterface $color;
     public Font $font;
     public string $hAlign;
-    public int $lineHeight;
+    public float $lineHeight;
     public int $size;
     public string $text;
     public string $vAlign;
@@ -43,7 +43,7 @@ public function hAlign(string $hAlign): self
         return $this;
     }
 
-    public function lineHeight(int $lineHeight): self
+    public function lineHeight(float $lineHeight): self
     {
         $this->lineHeight = $lineHeight;
         return $this;