v0.1.3 - Add PermissionTools

This release adds a few extra tools to make dealing with permissions easier.

• globalStack - This is a PermissionTreeStack which is global throughout the running process. This makes accessing it from anywhere easier, and allows for easier interaction between libraries.
• formatScope() - Format a scope string with variables.
  • In many cases this could be replaced with template literals, however this method allows for more strict formatting and simplified re-use of variables.
• assertPermission() - Assert that the global permission tree stack evaluates a given permission scope to ALLOW. If not, then an error is thrown, which can be handled upstream.
• AccessDeniedError - Extension of Error which takes in a scope instead of a message.