tweak versions to support php7.3

Author: tobz-nz

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.3', '7.4', '8.0', '8.1', '8.2']
     name: PHP ${{ matrix.php-versions }} Test on ${{ matrix.operating-system }}
     steps:
       - name: Checkout code

composer.json

@@ -35,13 +35,13 @@
         }
     },
     "require": {
-        "php": ">=7.2",
+        "php": ">=7.3",
         "omnipay/common": "^3.2",
-        "symfony/http-client": "^6.3"
+        "symfony/http-client": "^5.4"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6",
-        "mockery/mockery": "^1.6",
+        "mockery/mockery": "^1.5",
         "squizlabs/php_codesniffer": "^3.7",
         "omnipay/tests": "^4.1",
         "http-interop/http-factory-guzzle": "^1.2"