chore(pyproject.toml): update splinter version to "^0.19.0" to ensure compatibility with flask extras

Author: marcuxyz

poetry.lock

@@ -21,7 +21,7 @@ mkdocs-material = "^9.4.8"
 flask-sqlalchemy = "^3.0.5"
 pytest = "^7.4.3"
 black = ">=23.3,<25.0"
-splinter = {version = "^0.18.1", extras = ["flask"]}
+splinter = {version = "^0.19.0", extras = ["flask"]}
 urllib3 = "^1.26.18"
 
 [build-system]