Force doctrine/instantiator so we can still use PHP 7.0

composer.json

@@ -22,6 +22,7 @@
     "symfony/var-dumper": "~3.3.9",
     "squizlabs/php_codesniffer": "~3.1.0",
     "phpunit/phpunit": "~6.4.3",
+    "doctrine/instantiator": "~1.0.0",
     "ffmpeg/ffmpeg": "dev-release",
     "rg3/youtube-dl": "~2017.10.20",
     "rudloff/rtmpdump-bin": "~2.3.0",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "a187493715c03ec2fc880fdf1e4dae70",
+    "content-hash": "bb5bb53875e26136ad30f50a0ec063a6",
     "packages": [
         {
             "name": "aura/session",
@@ -999,32 +999,32 @@
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
-            "version": "1.1.0",
+            "version": "1.0.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda"
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
-                "reference": "185b8868aa9bf7159f5f953ed5afb2d7fcdc3bda",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": ">=5.3,<8.0-DEV"
             },
             "require-dev": {
                 "athletic/athletic": "~0.1.8",
                 "ext-pdo": "*",
                 "ext-phar": "*",
-                "phpunit/phpunit": "^6.2.3",
-                "squizlabs/php_codesniffer": "^3.0.2"
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "~2.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2.x-dev"
+                    "dev-master": "1.0.x-dev"
                 }
             },
             "autoload": {
@@ -1049,7 +1049,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2017-07-22T11:58:36+00:00"
+            "time": "2015-06-14T21:17:01+00:00"
         },
         {
             "name": "ffmpeg/ffmpeg",