tomlplusplus: C++20 MSVC Syntax Error [CMake]

Environment

Compiler:
MSVC

C++ standard mode (e.g. 17, 20, ‘latest’):
C++20

Target arch (e.g. x64):
x64

Exceptions enabled:
I am using the default (/EHsc) Exceptions

Relevant toml++ configuration customizations:
No overrides are used

Relevant compilation flags:
None

Describe the bug

Syntax/Unknown-Type/Traits errors.

toml.hpp(8103): error C2589: '(': illegal token on right side of '::'
toml.hpp(8612): note: see reference to function template instantiation 'int64_t toml::impl::abi_impl_noex::parser::parse_integer<16>(void) noexcept' being compiled
toml.hpp(8103): error C2062: type 'unknown-type' unexpected
toml.hpp(8103): error C2144: syntax error: 'unknown-type' should be preceded by '('
toml.hpp(8103): error C2059: syntax error: ')'
toml.hpp(8104): error C2143: syntax error: missing ';' before '{'
toml.hpp(8104): error C2059: syntax error: ','
toml.hpp(8104): error C2059: syntax error: ')'
toml.hpp(8104): error C2059: syntax error: 'return'
toml.hpp(8104): error C2059: syntax error: '}'
toml.hpp(8108): error C2059: syntax error: 'if'
toml.hpp(8108): error C2653: 'traits': is not a class or namespace name
toml.hpp(8110): error C2059: syntax error: 'else'
toml.hpp(8112): error C2059: syntax error: '}'
toml.hpp(8112): error C2143: syntax error: missing ';' before '}'

Steps to reproduce (or a small repro code sample)

Include it in any source file.

Additional information

Screenshots of the compiler error: