chore: Bump version in composer.json to 0.19.0

Author: DenverCoder1

composer.json

@@ -10,7 +10,7 @@
     "stats"
   ],
   "license": "MIT",
-  "version": "0.16.0",
+  "version": "0.19.0",
   "homepage": "https://github.com/DenverCoder1/github-readme-streak-stats",
   "autoload": {
     "classmap": [
@@ -32,4 +32,4 @@
     ],
     "test": "./vendor/bin/phpunit --testdox tests"
   }
-}
+}