Bump doctrine/instantiator from 1.3.0 to 1.3.1

Bumps [doctrine/instantiator](https://github.com/doctrine/instantiator) from 1.3.0 to 1.3.1.
- [Release notes](https://github.com/doctrine/instantiator/releases)
- [Commits](https://github.com/doctrine/instantiator/compare/1.3.0...1.3.1)

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

composer.lock

@@ -812,20 +812,20 @@
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
-            "version": "1.3.0",
+            "version": "1.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1"
+                "reference": "f350df0268e904597e3bd9c4685c53e0e333feea"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/ae466f726242e637cebdd526a7d991b9433bacf1",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/f350df0268e904597e3bd9c4685c53e0e333feea",
-                "reference": "ae466f726242e637cebdd526a7d991b9433bacf1",
+                "reference": "f350df0268e904597e3bd9c4685c53e0e333feea",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": "^7.1 || ^8.0"
             },
             "require-dev": {
                 "doctrine/coding-standard": "^6.0",
@@ -864,7 +864,7 @@
                 "constructor",
                 "instantiate"
             ],
-            "time": "2019-10-21T16:45:58+00:00"
+            "time": "2020-05-29T17:27:14+00:00"
         },
         {
             "name": "myclabs/deep-copy",