Laravel 7 Support

[cjreysayago]

Description

When installing the package on a Laravel 7 project, the following exception is displayed

Problem 1
    - Installation request for lightit/laravel-google-jobs dev-master -> satisfiable by lightit/laravel-google-jobs[dev-master].
    - Conclusion: remove laravel/framework v7.0.1
    - Conclusion: don't install laravel/framework v7.0.1
    - lightit/laravel-google-jobs dev-master requires illuminate/support 5.8.*|^6.0 -> satisfiable by illuminate/support[5.8.x-dev, 6.x-dev, v5.8.0, v5.8.11, v5.8.12, v5.8.14, v5.8.15, v5.8.17, v5.8.18, v5.8.19, v5.8.2, v5.8.20, v5.8.22, v5.8.24, v5.8.27, v5.8.28, v5.8.29, v5.8.3, v5.8.30, v5.8.31, v5.8.32, v5.8.33, v5.8.34, v5.8.35, v5.8.36, v5.8.4, v5.8.8, v5.8.9, v6.0.0, v6.0.1, v6.0.2, v6.0.3, v6.0.4, v6.1.0, v6.10.0, v6.11.0, v6.12.0, v6.13.0, v6.13.1, v6.14.0, v6.15.0, v6.15.1, v6.16.0, v6.17.0, v6.17.1, v6.18.0, v6.2.0, v6.3.0, v6.4.1, v6.5.0, v6.5.1, v6.5.2, v6.6.0, v6.6.1, v6.6.2, v6.7.0, v6.8.0].
    - don't install illuminate/support 5.8.x-dev|don't install laravel/framework v7.0.1