Update composer.

Author: michaeldrennen

composer.json

@@ -6,19 +6,19 @@
     "authors": [
         {
             "name": "Michael Drennen",
-            "email": "mdrennen@deerparkrd.com"
+            "email": "michaeldrennen74@gmail.com"
         }
     ],
     "minimum-stability": "stable",
     "require": {
         "php": "^7.2",
         "dprmc/cusip": "^1.0",
-        "guzzlehttp/guzzle": "^6.3",
+        "guzzlehttp/guzzle": "^6.3||^7.0",
         "psr/log": "^1.1",
         "nesbot/carbon": "^2.26"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.4"
+        "phpunit/phpunit": "^8.4||^9.0"
     },
     "autoload": {
         "psr-4": {