update package dependencies

composer.json

@@ -17,12 +17,12 @@
     ],
     "require": {
         "ext-curl": "*",
-        "php": ">=7.2",
-        "psr/log": "^1.0"
+        "php": "^7.4|^8.0",
+        "psr/log": "^1.0|^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "8.3.*",
-        "squizlabs/php_codesniffer": "3.4.*",
+        "phpunit/phpunit": "^8.0|^9.0",
+        "squizlabs/php_codesniffer": "^3.0",
         "php-coveralls/php-coveralls": "^2.4"
     },
     "autoload": {

phpunit.xml

@@ -1,21 +1,13 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<phpunit backupGlobals="false"
-         backupStaticAttributes="false"
-         bootstrap="vendor/autoload.php"
-         convertErrorsToExceptions="true"
-         convertNoticesToExceptions="true"
-         convertWarningsToExceptions="true"
-         processIsolation="false"
-         stopOnFailure="false"
-         colors="true">
-    <testsuites>
-        <testsuite name="All tests">
-            <directory>./test</directory>
-        </testsuite>
-    </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
-            <directory suffix=".php">./src</directory>
-        </whitelist>
-    </filter>
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" backupStaticAttributes="false" bootstrap="vendor/autoload.php" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.3/phpunit.xsd">
+  <coverage processUncoveredFiles="true">
+    <include>
+      <directory suffix=".php">./src</directory>
+    </include>
+  </coverage>
+  <testsuites>
+    <testsuite name="All tests">
+      <directory>./test</directory>
+    </testsuite>
+  </testsuites>
 </phpunit>