Support PHP8+

Author: Fenguoz

composer.json

@@ -17,12 +17,14 @@
         }
     ],
     "require": {
-        "iexbase/tron-api": "^2.0 || ^3.0 || ^3.1",
+        "php": ">=8.0",
+        "fenguoz/web3.php": "^1.0",
+        "fenguoz/tron-api": "~1.1",
         "ionux/phactor": "1.0.8",
-        "kornrunner/keccak": "^1.0"
+        "kornrunner/keccak": "~1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7 || ^7.5"
+        "phpunit/phpunit": "~7.5 || ~9.0"
     },
     "autoload": {
         "psr-4": {