Use strict check on null instead of empty(), so modifiers with 0 won't be empty + add a test case for it. fixes #285 (#286)

Author: jyrkidn

src/Lexers/ModelLexer.php

@@ -232,7 +232,7 @@ private function buildColumn(string $name, string $definition)
 
             if (isset(self::$modifiers[strtolower($value)])) {
                 $modifierAttributes = $parts[1] ?? null;
-                if (empty($modifierAttributes)) {
+                if ($modifierAttributes === null) {
                     $modifiers[] = self::$modifiers[strtolower($value)];
                 } else {
                     $modifiers[] = [self::$modifiers[strtolower($value)] => $modifierAttributes];

tests/Feature/Lexers/ModelLexerTest.php

@@ -662,6 +662,7 @@ public function modifierAttributesProvider()
         return [
             ['default:5', 'default', 5],
             ['default:0.00', 'default', 0.00],
+            ['default:0', 'default', 0],
             ['default:string', 'default', 'string'],
             ["default:'empty'", 'default', "'empty'"],
             ['default:""', 'default', '""'],