Add support for Laravel 5.7 (#8)

[ci skip] [skip ci]

Author: richan-fongdasen

.travis.yml

@@ -18,7 +18,7 @@ matrix:
     - php: 7.1
       env: LARAVEL=5.6.* ORCHESTRA=3.6.*
     - php: 7.2
-      env: LARAVEL=5.6.* ORCHESTRA=3.6.*
+      env: LARAVEL=5.7.* ORCHESTRA=3.7.*
 
   allow_failures:
     - env: COVERAGE=1

composer.json

@@ -23,8 +23,8 @@
     "require": {
         "php": "^5.5.9 || ^7.0 || ^7.1.3",
         "guzzlehttp/guzzle": "~6.0",
-        "illuminate/database": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*",
-        "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*"
+        "illuminate/database": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
+        "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*"
     },
     "require-dev": {
         "mockery/mockery": "~0.9.8",