Properties can not be integers

[ZehMatt]

If one copies the snippet from the reference https://cmkr.build/cmake-toml/#targets:

# See https://cmake.org/cmake/help/latest/manual/cmake-properties.7.html#properties-on-targets for a list of target properties
[target.mytarget.properties]
CXX_STANDARD = 17
CXX_STANDARD_REQUIRED = true
FOLDER = "MyFolder"

cmkr will show following error:

[error] toml::value::as_string(): bad_cast to string
 --> F:\C++\Buggerino\cmake.toml
    |
 12 | CXX_STANDARD = 17
    |                ~~ the actual type is integer