Broaden support for php back to 7.0, downgrade phpunit

Author: paolobueno

.gitignore

@@ -1,5 +1,5 @@
 vendor/
-composer.lock
+composer*.lock
 composer.phar
 .DS_Store
 .idea/

.travis.yml

@@ -1,10 +1,14 @@
 language: php
 dist: xenial
 php:
+    - 7.0
+    - 7.1
+    - 7.2
     - 7.3
     - 7.4
 
 before_script:
+    - if (( "$TRAVIS_PHP_VERSION" >= 7.4 )); then export COMPOSER="./composer-7-4.json"; fi
     - composer install
 
-script: phpunit --verbose
+script: php ./vendor/bin/phpunit --verbose

composer-7-4.json

@@ -0,0 +1,25 @@
+{
+    "name": "messagebird/php-rest-api",
+    "description": "MessageBird REST API client for PHP",
+    "type": "library",
+    "homepage": "https://github.com/messagebird/php-rest-api",
+    "license": "BSD-2-Clause",
+    "authors": [
+        {
+            "name": "MessageBird",
+            "email": "[email protected]"
+        }
+    ],
+    "require": {
+        "php": ">=7.4",
+        "ext-curl": "*"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^8"
+    },
+    "autoload": {
+        "psr-4": {
+            "MessageBird\\": "src/MessageBird/"
+        }
+    }
+}

composer.json

@@ -11,11 +11,11 @@
         }
     ],
     "require": {
-        "php": ">=7.2.0",
+        "php": ">=7.0",
         "ext-curl": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8"
+        "phpunit/phpunit": "^6"
     },
     "autoload": {
         "psr-4": {