Version update

Author: bbsnly

composer.json

@@ -7,14 +7,17 @@
   ],
   "homepage": "https://github.com/bbsnly/chartjs-php",
   "type": "package",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "license": "MIT",
   "authors": [
     {
       "name": "Anatoliy Babushka",
       "email": "anatoliybabushka@gmail.com"
     }
   ],
+  "require": {
+    "php": ">=7.0"
+  },
   "require-dev": {
     "phpunit/phpunit": "^6.2"
   },
@@ -36,4 +39,4 @@
   "config": {
     "sort-packages": true
   }
-}
+}