Merge pull request #199 from Gemorroj/patch-1

drop php <= 7.0

Author: oohnoitz

composer.json

@@ -12,10 +12,10 @@
         "irc": "irc://irc.irchighway.net/fooldriver"
     },
     "require": {
-        "php": "^5.6 || ^7 || ^8"
+        "php": "^7.1 || ^8"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5 || ^6 || ^7 || ^8 || ^9"
+        "phpunit/phpunit": "^7 || ^8 || ^9"
     },
     "autoload": {
         "psr-4": {