composer update

composer.json

@@ -1,9 +1,12 @@
 {
     "name": "xboston/metahash",
-    "description": "PHP MetaHash SDK",
+    "description": "MetaHash Cryptocurrency PHP SDK",
     "keywords": [
         "metahash",
-        "blockchain"
+        "blockchain",
+        "mhc",
+        "cryptocurrency",
+        "sdk"
     ],
     "license": "MIT",
     "type": "library",
@@ -13,7 +16,7 @@
         "ext-gmp": "*",
         "ext-json": "*",
         "mdanter/ecc": "^0.5.2",
-        "guzzlehttp/guzzle": "^6"
+        "guzzlehttp/guzzle": "^7"
     },
     "autoload": {
         "psr-4": {
@@ -22,7 +25,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2",
-        "overtrue/phplint": "^1",
+        "overtrue/phplint": "^2",
         "phpstan/phpstan": "^0.12",
         "squizlabs/php_codesniffer": "^3",
         "ghostff/dump7": "^1"