message: Fixing an assert in flexbuffers CreateVector
  An assert was blocking the creation of typedvectors. It was wrongly checking for limited types even though vector was not of fixedTyped.
diff: @@ -1443,7 +1443,7 @@ class Builder FLATBUFFERS_FINAL_CLASS {
  }
  // If you get this assert, your fixed types are not one of:
  // Int / UInt / Float / Key.
  - FLATBUFFERS_ASSERT(IsTypedVectorElementType(vector_type));
  + FLATBUFFERS_ASSERT(!fixed || IsTypedVectorElementType(vector_type));
  auto byte_width = Align(bit_width);
  // Write vector. First the keys width/offset if available, and size.
  if (keys) {
  