Laravel 7x (php 7.3) : Laravel Lang not working

[visualight]

Environment

• Laravel-Lang Common Version: 1.0.0
• Laravel Version: 7.30.6
• PHP Version: 7.3.28

I installed Laravel Lang without any problem but the command : php artisan lang:add fr (or other lang) return the following error :

 ParseError 

  syntax error, unexpected 'static' (T_STATIC)

  at vendor/dragon-code/contracts/src/Pretty/Arr/Caseable.php:17
    13|     public const PASCAL_CASE = 4;
    14| 
    15|     public const SNAKE_CASE = 2;
    16| 
  > 17|     public function setCase(int $type = self::NO_CASE): static;
    18| }

Issue description

$ composer require --dev laravel-lang/common

Info from https://repo.packagist.org: #StandWithUkraine
Using version ^1.0 for laravel-lang/common
./composer.json has been updated
Running composer update laravel-lang/common
Loading composer repositories with package information
Info from https://repo.packagist.org: #StandWithUkraine
Updating dependencies
Lock file operations: 8 installs, 0 updates, 0 removals
  - Locking dragon-code/contracts (v2.20.0)
  - Locking dragon-code/pretty-array (v3.0.0)
  - Locking dragon-code/support (v5.8.1)
  - Locking laravel-lang/attributes (v1.1.3)
  - Locking laravel-lang/common (v1.0.0)
  - Locking laravel-lang/http-statuses (v2.1.3)
  - Locking laravel-lang/lang (10.9.5)
  - Locking laravel-lang/publisher (v12.2.1)
Writing lock file
Installing dependencies from lock file (including require-dev)
Package operations: 8 installs, 0 updates, 0 removals
  - Installing dragon-code/contracts (v2.20.0): Extracting archive
  - Installing dragon-code/support (v5.8.1): Extracting archive
  - Installing dragon-code/pretty-array (v3.0.0): Extracting archive
  - Installing laravel-lang/publisher (v12.2.1): Extracting archive
  - Installing laravel-lang/lang (10.9.5): Extracting archive
  - Installing laravel-lang/http-statuses (v2.1.3): Extracting archive
  - Installing laravel-lang/attributes (v1.1.3): Extracting archive
  - Installing laravel-lang/common (v1.0.0): Extracting archive
5 package suggestions were added by new dependencies, use `composer suggest` to see details.

$ php artisan lang:add fr
    
Processing LaravelLang\Attributes\Provider...
Processing LaravelLang\HttpStatuses\Provider...
Processing LaravelLang\Lang\Provider...
Saving changes...

   ParseError 

  syntax error, unexpected 'static' (T_STATIC)

  at vendor/dragon-code/contracts/src/Pretty/Arr/Caseable.php:17
    13|     public const PASCAL_CASE = 4;
    14| 
    15|     public const SNAKE_CASE = 2;
    16| 
  > 17|     public function setCase(int $type = self::NO_CASE): static;
    18| }
    19| 

      +1 vendor frames 
  2   [internal]:0
      Composer\Autoload\ClassLoader::loadClass("DragonCode\Contracts\Pretty\Arr\Caseable")

      +3 vendor frames 
  6   [internal]:0
      Composer\Autoload\ClassLoader::loadClass("DragonCode\PrettyArray\Services\Formatter")

Steps to reproduce

1. Install Laravel ^7
2. Install Laravel Lang
3. Gen a language
4. See error

[andrey-helldar]

To solve this problem you need to install a specific version of the dependency:

composer require dragon-code/contracts:2.19.1 --dev

Contracts version 2.20 includes changes that cause this error.

[andrey-helldar]

Since you are not the first person to encounter a similar error on older versions of Laravel, which are not supported by us or the Laravel team, I still released a fix for the 1st version.

You can simply run the composer update command and everything you need will be installed automatically.

Thank you for your issue.