Update support to 5.7

Author: Jon Baker

composer.json

@@ -14,10 +14,10 @@
     "require": {
         "php": ">=5.5.9",
         "twilio/sdk": "~5.16",
-        "illuminate/notifications": "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/events": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*",
-        "illuminate/queue": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*"
+        "illuminate/notifications": "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.*",
+        "illuminate/events": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*",
+        "illuminate/queue": "5.1.*|5.2.*|5.3.*|5.4.*|5.5.*|5.6.*|5.7.*"
     },
     "require-dev": {
         "mockery/mockery": "^0.9.5",