Reports object that can be converted to data object

data object auto-generates toString, equals, hashCode and readResolve if the object is annotated with java.io.Serializable

The inspection suggests to convert object to data object in 3 cases:

• When custom toString returns name of the class
• When object implements java.io.Serializable
• When object inherits sealed class/interface

Example:

    object Foo {
        override fun toString(): String = "Foo"
    }

After the quick-fix is applied:

    data object Foo

This inspection only reports if the Kotlin language level of the project or module is 1.8 or higher