Merge pull request #20 from overtrue/dependabot/composer/guzzlehttp/guzzle-tw-6.3or-tw-7.0

Update guzzlehttp/guzzle requirement from ^6.3 to ^6.3 || ^7.0

Author: overtrue

composer.json

@@ -4,7 +4,7 @@
     "type": "library",
     "require": {
         "php": ">=7.0",
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.3 || ^7.0",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-simplexml": "*",