message: [c++] Remove Boost min version from CHANGELOG
  This change has not yet been made, as it breaks the current AppVeyor
  build.
  Issue has been opened to
  remind us to bump the minimum version later.
  [skip ci]
diff: @@ -58,9 +58,6 @@ different versioning scheme, following the Haskell community's
  have been removed. The `blob` and `nullable` types are not customizable,
  so these where never needed or used. The related functionality provided by
  `bond::get_list_sub_type_id` remains.
  -* The CMake build now enforces a minimum Boost version of 1.58. The build
  - has required Boost 1.58 or later since version 5.2.0, but this was not
  - enforced.
  * gRPC v1.10.0 is now required to use Bond-over-gRPC.
  * This version include a number of memory leak fixes that users of Bond-over-gRPC were encountering. [Issue #810](https://github.com/Microsoft/bond/issues/810)
  * Fixed includes for gRPC services with events or parameterless methods.
  