Bump firebase/php-jwt from 4.0.0 to 5.0.0 in /3rdparty

Bumps [firebase/php-jwt](https://github.com/firebase/php-jwt) from 4.0.0 to 5.0.0.
- [Release notes](https://github.com/firebase/php-jwt/releases)
- [Commits](https://github.com/firebase/php-jwt/compare/v4.0.0...v5.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

3rdparty/composer.json

@@ -5,6 +5,6 @@
     },
     "require": {
         "onelogin/php-saml": "^3.0",
-        "firebase/php-jwt": "^4.0"
+        "firebase/php-jwt": "^5.0"
     }
 }

3rdparty/composer.lock

@@ -4,25 +4,28 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f3e661f8388070704bd9b01b48752bf0",
+    "content-hash": "5f70ca113025850bd69057512953d9db",
     "packages": [
         {
             "name": "firebase/php-jwt",
-            "version": "v4.0.0",
+            "version": "v5.0.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/firebase/php-jwt.git",
-                "reference": "dccf163dc8ed7ed6a00afc06c51ee5186a428d35"
+                "reference": "9984a4d3a32ae7673d6971ea00bae9d0a1abba0e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/firebase/php-jwt/zipball/dccf163dc8ed7ed6a00afc06c51ee5186a428d35",
-                "reference": "dccf163dc8ed7ed6a00afc06c51ee5186a428d35",
+                "url": "https://api.github.com/repos/firebase/php-jwt/zipball/9984a4d3a32ae7673d6971ea00bae9d0a1abba0e",
+                "reference": "9984a4d3a32ae7673d6971ea00bae9d0a1abba0e",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.0"
             },
+            "require-dev": {
+                "phpunit/phpunit": " 4.8.35"
+            },
             "type": "library",
             "autoload": {
                 "psr-4": {
@@ -47,7 +50,7 @@
             ],
             "description": "A simple library to encode and decode JSON Web Tokens (JWT) in PHP. Should conform to the current spec.",
             "homepage": "https://github.com/firebase/php-jwt",
-            "time": "2016-07-18T04:51:16+00:00"
+            "time": "2017-06-27T22:17:23+00:00"
         },
         {
             "name": "onelogin/php-saml",