Drop support for PHP 7.3 (#1158)

* Update compser.json files

* Update GitHub Actions workflows

* Update CHANGELOG.md

* Update php.yml

Author: jbelien

.github/workflows/provider.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php-version: ['7.3', '7.4', '8.0', '8.1']
+        php-version: ['7.4', '8.0', '8.1']
     steps:
     - uses: actions/checkout@v2
     - name: Use PHP ${{ matrix.php-version }}

composer.json

@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": "^7.3 || ^8.0",
+        "php": "^7.4 || ^8.0",
         "geocoder-php/common-http": "^4.0",
         "willdurand/geocoder": "^4.0"
     },