Merge pull request #78 from yoshz/psr-cache-v3

Added psr/cache:^3.0 dependency

Author: dbu

Diff for: composer.json

@@ -12,7 +12,7 @@
     ],
     "require": {
         "php": "^7.1 || ^8.0",
-        "psr/cache": "^1.0 || ^2.0",
+        "psr/cache": "^1.0 || ^2.0 || ^3.0",
         "php-http/client-common": "^1.9 || ^2.0",
         "php-http/message-factory": "^1.0",
         "symfony/options-resolver": "^2.6 || ^3.0 || ^4.0 || ^5.0 || ^6.0"