Version update

Author: bbsnly

composer.json

@@ -8,7 +8,7 @@
     ],
     "homepage": "https://github.com/bbsnly/chartjs-php",
     "type": "package",
-    "version": "2.1.0",
+    "version": "2.1.1",
     "license": "MIT",
     "authors": [
         {
@@ -17,7 +17,7 @@
         }
     ],
     "require": {
-        "php": ">=7.0"
+        "php": ">=7.1"
     },
     "autoload": {
         "psr-4": {
@@ -38,5 +38,10 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^6.4"
+    },
+    "scripts": {
+        "test": [
+          "vendor/bin/phpunit"
+        ]
     }
 }