v0.4.0

• Allow Session to store values with specified type (V) (i.e. generics) (#21)
  • Session state is now a map[string]V instead of a map[string]any
  • Update Set, Get, and GetOk methods to use generic type V
  • Change Session to Session[V any] to specify the type of value stored in the Session
  • See updated usage docs for examples
• Change Store to Store[V any] to specify the type of value stored in sessions
• Change NewCookieStore to NewCookieStore[V any] to specify the type of value stored in sessions