Bump laravel/framework from 5.6.23 to 5.8.38

Bumps [laravel/framework](https://github.com/laravel/framework) from 5.6.23 to 5.8.38.
- [Release notes](https://github.com/laravel/framework/releases)
- [Changelog](https://github.com/laravel/framework/blob/8.x/CHANGELOG-8.x.md)
- [Commits](laravel/framework@v5.6.23...v5.8.38)

---
updated-dependencies:
- dependency-name: laravel/framework
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -7,7 +7,7 @@
     "require": {
         "php": "^7.1.3",
         "fideloper/proxy": "^4.0",
-        "laravel/framework": "5.6.*",
+        "laravel/framework": "5.8.*",
         "laravel/tinker": "^1.0"
     },
     "require-dev": {