chore: drop support for PHP 7.3 (#495)

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ "7.1", "7.2", "7.3", "7.4", "8.0", "8.1", "8.2" ]
+        php: [ "7.4", "8.0", "8.1", "8.2" ]
     name: PHP ${{matrix.php }} Unit Test
     steps:
       - uses: actions/checkout@v2

composer.json

@@ -20,7 +20,7 @@
     ],
     "license": "BSD-3-Clause",
     "require": {
-        "php": "^7.1||^8.0"
+        "php": "^7.4||^8.0"
     },
     "suggest": {
         "paragonie/sodium_compat": "Support EdDSA (Ed25519) signatures when libsodium is not present",
@@ -33,8 +33,8 @@
     },
     "require-dev": {
         "guzzlehttp/guzzle": "^6.5||^7.4",
-        "phpspec/prophecy-phpunit": "^1.1",
-        "phpunit/phpunit": "^7.5||^9.5",
+        "phpspec/prophecy-phpunit": "^2.0",
+        "phpunit/phpunit": "^9.5",
         "psr/cache": "^1.0||^2.0",
         "psr/http-client": "^1.0",
         "psr/http-factory": "^1.0"

tests/CachedKeySetTest.php

@@ -6,6 +6,7 @@
 use OutOfBoundsException;
 use PHPUnit\Framework\TestCase;
 use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
 use Psr\Cache\CacheItemInterface;
 use Psr\Cache\CacheItemPoolInterface;
 use Psr\Http\Client\ClientInterface;
@@ -14,6 +15,8 @@
 
 class CachedKeySetTest extends TestCase
 {
+    use ProphecyTrait;
+
     private $testJwksUri = 'https://jwk.uri';
     private $testJwksUriKey = 'jwkshttpsjwk.uri';
     private $testJwks1 = '{"keys": [{"kid":"foo","kty":"RSA","alg":"foo","n":"","e":""}]}';