Merge pull request #160 from slimphp/dependabot/composer/slim/psr7-tw-1.1

Update slim/psr7 requirement from ^1.0 to ^1.1

Author: l0gicgate

composer.json

@@ -26,7 +26,7 @@
         "monolog/monolog": "^2.0",
         "php": "^7.2",
         "php-di/php-di": "^6.1",
-        "slim/psr7": "^1.0",
+        "slim/psr7": "^1.1",
         "slim/slim": "^4.5"
     },
     "require-dev": {