Update README.md

add issues stub section

Author: leha-bot

README.md

@@ -1,11 +1,13 @@
 # Proposal to add a stack trace to C++
-
+<!-- todo: make it like http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0275r0.html -->
 ## The problem
-<!-- motivation ?? -->
+<!-- motivation: too hard for users -->
 <!-- todo: define a problem like: sometimes developers need to view the stack trace. Stack is the ..., stack trace is the...-->
 The problem defined is available on this link: (https://stdcpp.ru/proposals/19b28afa-bc73-4d8f-a7c8-c5723b544ecc)
 
 ## The solution
 the solution is to add the stack trace classes into the Standard C++ Library, based on the https://github.com/apolukhin/stacktrace library
 
+## Issues
+<!-- noexcept ctor, no caching -->
 ## References