Support inline classes as Store Key about store

[ychescale9]

Looks like it's a bug in the Kotlin compiler where inlined type doesn't work with suspend lambda with multiple parameters. In our case it's this lambda here: https://github.com/dropbox/Store/blob/86f7b1b06068a6665895d179b6f4bf8c0f181dc4/store/src/main/java/com/dropbox/android/external/store4/impl/SourceOfTruth.kt#L39

A simple test case:

inline class MyKey(val key: String)
inline class MyValue(val value: String)

class InlineClassTest {

    private val write: suspend (MyKey, MyValue) -> Unit = { key, value ->
        print("$key, $value")
    }

    @Test
    fun test() {
        runBlocking {
            write(MyKey("key"), MyValue("value"))
        }
    }
}

Stacktrace:

com.example.MyKey cannot be cast to java.lang.String
java.lang.ClassCastException: com.example.MyKey cannot be cast to java.lang.String
	at com.example.InlineClassTest$write$1.invoke(InlineClassTest.kt)
	at com.example.InlineClassTest$test$1.invokeSuspend(InlineClassTest.kt:35)

[digitalbuddha]

please track on kotlin repo. Closing here