value_to, value_from precedence javadoc

[vinniefalco]

value_to is unclear about the precedence of the three listed options (constructor, library provided conversion or tag_invoke) if multiple are present provided this is actually possible. The same is true for value_from.

[sdkrystian]

https://develop.json.cpp.al/json/usage/conversion.html

The library provided overloads have no special prioritization over those provided by the user, so care should be taken to avoid writing ambiguous declarations:

[vinniefalco]

We are removing the constructor, and the javadocs should probably repeat the warning

[sdkrystian]

Sounds good

[grisumbras]

The order is now documented (as of release 1.81).