Parsing simple zeroes throws type exception

[tksharpless]

Description

Not strictly a bug, but not ideal. Many apps print a simple '0' for all zero numbers, regardless of type. nlohmann-json parses those as unsigned int and throws an exception, for example in value(var, 0.0). There should be an option to promote 0 to float in this case; perhaps even for other numbers that look like an int. Or maybe there is such an option and I don't know it?

Reproduction steps

parse a Json file (not written by nlohmann, of course) that contains simple integer strings as values that you know should be float, using value(var, 0.0).

Expected vs. actual results

expect automatic promotion to double or whatever I assign the value to
get an exception complaining of incompatible types

Minimal code example

No response

Error messages

No response

Compiler and operating system

MSVCC 2022 Win10

Library version

3.9.1

Validation

• The bug also occurs if the latest version from the develop branch is used.
• I can successfully compile and run the unit tests.

[Tatenda]

Hello I hope you're well, I am new but also very much ready to learn. I would like to help fix this bug