From include/nlohmann/json.hpp

The change from ValueType ret; to ValueType ret{}; is causing a compiler error for the construction of a type with an explicit default constructor of the form.

explicit Foo(const alloc_context& allocContext = alloc_context())

In vs2019 it gives the following errors, using c++17
error C2512: '###': no appropriate default constructor available
note: Constructor for class '###' is declared 'explicit'

This is happening in a from_json call to my custom container type

Worked in 3.9.1, does not work in 3.10.2