Added generic LifeCycle interfaces.

types/hapi/v17/definitions/util/lifecycle.d.ts

@@ -0,0 +1,28 @@
+/**
+ * Lifecycle methods are the interface between the framework and the application. Many of the request lifecycle steps:
+ * extensions, authentication, handlers, pre-handler methods, and failAction function values are lifecyle methods
+ * provided by the developer and executed by the framework.
+ * Each lifecycle method is a function with the signature await function(request, h, [err]) where:
+ * * request - the request object.
+ * * h - the response toolkit the handler must call to set a response and return control back to the framework.
+ * * err - an error object availble only when the method is used as a failAction value.
+ */
+export interface LifecycleMethod {
+
+    // TODO need to be implemented. Ideally with Generics types.
+
+}
+
+/**
+ * Each lifecycle method must return a value or a promise that resolves into a value. If a lifecycle method returns
+ * without a value or resolves to an undefined value, an Internal Server Error (500) error response is sent.
+ * [See docs](https://github.com/hapijs/hapi/blob/master/API.md#lifecycle-methods)
+ */
+export interface LifecycleReturnValue {
+
+
+
+}
+
+
+