Add github actions

Author: odan

.github/workflows/php.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ['7.0', '7.1', '7.2', '7.3', '7.4']
+        php-versions: ['7.1', '7.2', '7.3', '7.4']
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
 
     steps:

README.md

@@ -19,7 +19,7 @@ $ composer require selective/base32
 
 ## Requirements
 
-* PHP 7.0+
+* PHP 7.1.3+
 
 ## Usage