Drop PHP <7.1

Author: Nyholm

.travis.yml

@@ -7,11 +7,8 @@ cache:
         - $HOME/.composer/cache/files
 
 php:
-    - 5.5
-    - 5.6
-    - 7.0
     - 7.1
-    - hhvm
+    - 7.2
 
 env:
     global:
@@ -26,7 +23,7 @@ matrix:
         - php: hhvm
     fast_finish: true
     include:
-        - php: 5.5
+        - php: 7.1
           env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
 
 before_install:

composer.json

@@ -15,7 +15,7 @@
         }
     ],
     "require": {
-        "php": "^5.5 || ^7.0",
+        "php": "^7.1",
         "php-http/httplug": "^1.0",
         "guzzlehttp/guzzle": "^6.0"
     },