Drop support for PHP 5.6 and 7.0

Author: colinodell

.travis.yml

@@ -1,8 +1,6 @@
 language: php
 
 php:
-  - "5.6"
-  - "7.0"
   - "7.1"
   - "7.2"
   - "7.3"
@@ -13,7 +11,7 @@ env:
 
 matrix:
   include:
-    - php: 5.6
+    - php: 7.1
       dist: precise
       env: 'COMPOSER_FLAGS="--prefer-stable --prefer-lowest" PHPUNIT=true'
     - name: phpstan

composer.json

@@ -19,14 +19,14 @@
         }
     ],
     "require": {
-        "php": "^5.6|^7.0|^8.0",
+        "php": "^7.1.3|^8.0",
         "ext-json": "*",
         "ext-mbstring": "*"
     },
     "require-dev": {
         "mikehaertl/php-shellcommand": "^1.2.5",
         "squizlabs/php_codesniffer": "^2.3",
-        "symfony/finder": "^2.8|^3.4|^4.1",
+        "symfony/finder": "^4.4|^5.2",
         "symfony/phpunit-bridge": "^5.1"
     },
     "autoload": {