multiplatform

Probably the best place is to put it after info about found files Found 14 duplicated files in 24 groups, **searching took 22 seconds**

There are some APIs that can be improved/simplified. This issue is to collect all the cases. This is also a good place to raise and discuss any proposals or concerns.

• flatMap - add default value for the maxConcurrency argument, remove flatMap variants without the maxConcurrency argument
• flatMap with resultSelector - reorder arguments in the following way: `resultSelec

Hi.
When I was upgrading from 1.12.0 to 1.12.1, my test cases using DateFormat("z") went failing after that.

    @Test
    fun test() {
        val expected = TimezoneOffset(9.hours)
        val actual = DateFormat("z").parse("+09:00").offset
        assertEquals(expected, actual)
    }

This test case success with 1.12.0 but, it fails with 1.12.1 and 2.0.0-rc2.

Blocked by #2