README: Improvement ideas section

Author: lukaskubanek

README-legacy.md

@@ -17,10 +17,3 @@ let hook = try testObj.hook(
 InterposeKit can hook classes and object. Class hooking is similar to swizzling, but object-based hooking offers a variety of new ways to set hooks. This is achieved via creating a dynamic subclass at runtime. 
 
 Caveat: Hooking will fail with an error if the object uses KVO. The KVO machinery is fragile and it's to easy to cause a crash. Using KVO after a hook was created is supported and will not cause issues.
-
-## Improvement Ideas
-
-- Write proposal to allow to [convert the calling convention of existing types](https://twitter.com/steipete/status/1266799174563041282?s=21).
-- Use the C block struct to perform type checking between Method type and C type (I do that in  [Aspects library](https://github.com/steipete/Aspects)), it's still a runtime crash but could be at hook time, not when we call it.
-- Add a way to get all current hooks from an object/class.
-- Switch to Trampolines to manage cases where other code overrides super, so we end up with a super call that's [not on top of the class hierarchy](https://github.com/steipete/InterposeKit/pull/15#discussion_r439871752).

README.md

@@ -177,9 +177,11 @@ That said, InterposeKit is designed to be safe for production use. It includes g
 
 ## Improvement Ideas
 
-- Support for hooking KVO-enabled objects
-- Signature type checking at hook construction
-- Support for reverting multiple hooks on a class in an arbitrary order
+- Support for hooking KVO-enabled objects ([#19](https://github.com/structuredpath/InterposeKit/issues/19))
+- Correct super lookup when injecting a trampoline into classes with overridden methods ([#21](https://github.com/structuredpath/InterposeKit/issues/21))
+- Signature type checking at hook construction ([#20](https://github.com/structuredpath/InterposeKit/issues/20))
+- A way for retrieving all hooks on an object/class
+- Support for reverting multiple hooks on a class in an arbitrary order ([#12](https://github.com/structuredpath/InterposeKit/issues/12))
 
 ## References