Updated dependencies.

Author: guillermoandrae

composer.json

@@ -2,11 +2,10 @@
     "name": "guillermoandrae/php-dynamodb",
     "description": "A PHP library that can be used to interact with Amazon DynamoDB",
     "license": "MIT",
-    "minimum-stability": "dev",
     "require": {
         "php": "^7.2",
         "aws/aws-sdk-php": "^3.95",
-        "guillermoandrae/php-collection": "1.*"
+        "guillermoandrae/php-collection": "^1.0"
     },
     "autoload": {
         "psr-4": {