improve scala compile support #1470

[sinodzh]

What this PR does / why we need it?

improve scala compile support #1470

Summary of your change

add function put in JSONObject

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.

[CLAassistant]

All committers have signed the CLA.

[wenshao]

你在执行下mvn test修复下单测的问题

[sinodzh]

你在执行下mvn test修复下单测的问题
#507
#518
fastjson2需要支持非string的key的put是吧，如果是的话，那还不能我这样改。

[wenshao]

你在执行下mvn test修复下单测的问题
#507
#518
fastjson2需要支持非string的key的put是吧，如果是的话，那还不能我这样改。

是的，要支持non-string key

[sinodzh]

你在执行下mvn test修复下单测的问题
#507
#518
fastjson2需要支持非string的key的put是吧，如果是的话，那还不能我这样改。

是的，要支持non-string key

那non-string key，是一个jsonobject实例里都是一个类型的key，还是可以多个类型的key,，比如"a"，1，2.0l 这样的key