Add breaking changes

BreakingChanges.md

@@ -2,6 +2,8 @@
 
 ## development HEAD
 
+- The `DTAResolver` and the cli option `--call-graph-analysis=dta` do not work anymore (due to opaque pointers) and will be removed for the next release. Please use the `OTF` or `RTA` resolver instead.
+- The default type-hierarchy implementation has been changed from `LLVMTypeHierarchy` to `DIBasedTypeHierarchy`. This also requires all affected analyses to be performed on LLVM IR that contains debug information.
 - The API of the `TypeHierarchy` interface (and thus the `LLVMTypeHierarchy` and `DIBasedTypeHierarchy` as well) has changed:
   - No handling of the super-type relation (only sub-types)
   - No VTable handling anymore -- has been out-sourced into `LLVMVFTableProvider`