laravel 6.0 support

.gitignore

@@ -2,3 +2,4 @@
 /.idea
 /node_modules
 /composer.lock
+/.phpunit.result.cache

.travis.yml

@@ -1,3 +1,7 @@
+cache:
+  directories:
+    - $HOME/.composer/cache
+
 language: php
 
 sudo: false
@@ -7,23 +11,33 @@ notifications:
         on_success: never
         on_failure: always
 
-php:
-  - 7.0
-  - 7.1
-  - 7.2
-
-env:
-  matrix:
-    - COMPOSER_FLAGS="--prefer-lowest"
-    - COMPOSER_FLAGS=""
+matrix:
+  include:
+    - php: 7.2
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-lowest'
+    - php: 7.2
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-stable'
+    - php: 7.3
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-lowest'
+    - php: 7.3
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-stable'
+    - php: 7.4snapshot
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-lowest'
+    - php: 7.4snapshot
+      env: LARAVEL='6.*' TESTBENCH='4.*' COMPOSER_FLAGS='--prefer-stable'
+  fast_finish: true
+  allow_failures:
+    - php: 7.4snapshot
 
 before_install:
-  - travis_retry composer self-update --stable -n
+  - composer config discard-changes true
   - composer validate --no-check-all --strict
+  - travis_retry composer self-update
+  - travis_retry composer require "laravel/framework:${LARAVEL}" "orchestra/testbench:${TESTBENCH}" --no-interaction --no-update
 
 install:
-  - travis_retry composer update --prefer-source $COMPOSER_FLAGS
-  - travis_retry composer require --dev satooshi/php-coveralls
+  - travis_retry composer update ${COMPOSER_FLAGS} --prefer-dist --no-interaction --no-suggest
+  - composer require satooshi/php-coveralls --dev
 
 script:
   - composer run phpunit -- --coverage-clover ./tests/logs/clover.xml

README.md

@@ -2,8 +2,6 @@
 
 [![Build Status](https://travis-ci.org/melihovv/collection-grouped-by-model.svg?branch=master)](https://travis-ci.org/melihovv/collection-grouped-by-model)
 [![styleci](https://styleci.io/repos/107822001/shield)](https://styleci.io/repos/107822001)
-[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/melihovv/collection-grouped-by-model/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/melihovv/collection-grouped-by-model/?branch=master)
-[![SensioLabsInsight](https://insight.sensiolabs.com/projects/0cbdb2a1-cbed-4232-9c0a-48a78cf741ef/mini.png)](https://insight.sensiolabs.com/projects/0cbdb2a1-cbed-4232-9c0a-48a78cf741ef)
 [![Coverage Status](https://coveralls.io/repos/github/melihovv/collection-grouped-by-model/badge.svg?branch=master)](https://coveralls.io/github/melihovv/collection-grouped-by-model?branch=master)
 
 [![Packagist](https://img.shields.io/packagist/v/melihovv/collection-grouped-by-model.svg)](https://packagist.org/packages/melihovv/collection-grouped-by-model)

composer.json

@@ -15,11 +15,11 @@
     }
   ],
   "require": {
-    "php": ">=7.0",
-    "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0"
+    "php": ">=7.2",
+    "illuminate/support": "^6.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "~6.0|~7.0"
+    "phpunit/phpunit": "^8.0"
   },
   "autoload": {
     "psr-4": {