feat: add the Drupal ecosystem

Signed-off-by: Gareth Jones <3151613+G-Rath@users.noreply.github.com>

Author: G-Rath

tools/osv-linter/internal/pkgchecker/ecosystems.go

@@ -140,6 +140,7 @@ func VersionsExistInEcosystem(pkg string, versions []string, ecosystem string) e
 		return nil
 	case "Drupal":
 		return nil
+	case "Drupal": return nil
 	case "GIT":
 		return nil
 	case "GitHub Actions":