Update changelog date

Author: Riimu

.gitignore

@@ -1,4 +1,3 @@
 build/
-coverage/
 vendor/
 composer.lock

CHANGES.md

@@ -1,6 +1,6 @@
 # Changelog #
 
-## v1.1.0 (2017-06-18) ##
+## v1.1.0 (2017-06-28) ##
 
  * Empty objects and objects that don't implement `Traversable` are now always
    encoded as JSON objects (for `json_encode()` compatibility).

composer.json

@@ -22,9 +22,9 @@
     "psr/http-message": "^1.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^5.7 || ^6.0",
-    "squizlabs/php_codesniffer": "^2.8",
-    "friendsofphp/php-cs-fixer": "^2.1"
+    "phpunit/phpunit": "^5.7 || ^6.2",
+    "squizlabs/php_codesniffer": "^3.0",
+    "friendsofphp/php-cs-fixer": "^2.3"
   },
   "autoload": {
     "psr-4": {