Upgrade to laravel/framework 5.6 (#44)

* Updating laravel/framework to 5.6.* + related changes.

* Updating php requirement to ^7.2

* Updating .travis.yml php version to ^7.2

* Trying fixing "Chrome version must be between 70 and 73" by downgrading Laravel Dusk to "^3.0"

* Adding .editorconfig

* Removing deprecated APP_LOG_LEVEL=debug from .env.example

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_size = 2

.env.example

@@ -2,7 +2,6 @@ APP_NAME="Browser Adventure"
 APP_ENV=local
 APP_KEY=
 APP_DEBUG=true
-APP_LOG_LEVEL=debug
 APP_URL=http://localhost:8000
 
 DB_CONNECTION=sqlite

.travis.yml

@@ -3,7 +3,7 @@ language: php
 dist: trusty
 
 php:
-  - 7.1
+  - 7.2
 
 install:
   - cp .env.example .env

composer.json

@@ -8,19 +8,19 @@
     "license": "MIT",
     "type": "project",
     "require": {
-        "php": ">=7.0.0",
-        "fideloper/proxy": "~3.3",
+        "php": "^7.2",
+        "fideloper/proxy": "^4.0",
         "intervention/image": "^2.4",
-        "laravel/framework": "5.5.*",
+        "laravel/framework": "5.6.*",
         "laravel/tinker": "~1.0",
         "tcg/voyager": "^1.2"
     },
     "require-dev": {
         "filp/whoops": "~2.0",
         "fzaninotto/faker": "~1.4",
-        "laravel/dusk": "^2.0",
+        "laravel/dusk": "^3.0",
         "mockery/mockery": "0.9.*",
-        "phpunit/phpunit": "~6.0"
+        "phpunit/phpunit": "^7.0"
     },
     "autoload": {
         "files": [