fix: bump to 1.0

Author: wilr

composer.json

@@ -16,7 +16,7 @@
   ],
   "require": {
     "silverstripe/framework": "^4",
-    "level51/silverstripe-jwt-utils": "^0.2"
+    "level51/silverstripe-jwt-utils": "^1"
   },
   "require-dev": {
     "phpunit/phpunit": "^5.7",