diff --git a/composer.lock b/composer.lock
index f09bfcc..9f5ffcd 100644
--- a/composer.lock
+++ b/composer.lock
@@ -164,16 +164,16 @@
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@@ -3072,20 +3379,20 @@
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@@ -3141,20 +3452,20 @@
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@@ -3217,20 +3528,20 @@
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@@ -3239,7 +3550,7 @@
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@@ -3297,29 +3608,30 @@
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+                "php": ">=7.2.5",
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@@ -3360,24 +3672,24 @@
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+                "php": ">=7.2.5",
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@@ -3386,7 +3698,11 @@
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+                    "url": "https://github.com/symfony/contracts"
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@@ -3418,30 +3734,44 @@
                 "interoperability",
                 "standards"
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-            "time": "2019-10-14T12:27:06+00:00"
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
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+            "time": "2020-07-06T13:23:11+00:00"
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-            "version": "v4.4.10",
+            "version": "v5.1.3",
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@@ -3482,27 +3812,112 @@
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-            "time": "2020-05-20T08:37:50+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
+        },
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+            "source": {
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+                "url": "https://github.com/symfony/string.git",
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+                "symfony/polyfill-mbstring": "~1.0",
+                "symfony/polyfill-php80": "~1.15"
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+                "symfony/translation-contracts": "^1.1|^2",
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+            "autoload": {
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+                    "Symfony\\Component\\String\\": ""
+                },
+                "files": [
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+                ],
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
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+            "authors": [
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+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
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+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony String component",
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+                "string",
+                "unicode",
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                 "url": "https://github.com/theseer/tokenizer.git",
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@@ -3522,28 +3937,35 @@
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@@ -3570,12 +3992,13 @@
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+            "time": "2020-07-08T17:02:28+00:00"
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diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index dab1f46..7ff68f8 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -4,7 +4,5 @@ parameters:
         - src/
         - tests/
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-        - "~^Cannot access offset 'variables' on array|object|null.$~"
-        - '~^Call to an undefined method Psr\\Http\\Message\\RequestInterface::withParsedBody\(\)\.$~'
+        - '~^Cannot access offset ''(variables|map)'' on array\|object\|null.$~'