Relax LocalDateTime constructor components optionality for seconds and nanoseconds

Author: ilya-g

core/commonMain/src/LocalDateTime.kt

@@ -23,7 +23,7 @@ public expect class LocalDateTime : Comparable<LocalDateTime> {
      * @throws IllegalArgumentException if any parameter is out of range, or if [dayOfMonth] is invalid for [month] and
      * [year].
      */
-    public constructor(year: Int, monthNumber: Int, dayOfMonth: Int, hour: Int, minute: Int, second: Int, nanosecond: Int)
+    public constructor(year: Int, monthNumber: Int, dayOfMonth: Int, hour: Int, minute: Int, second: Int = 0, nanosecond: Int = 0)
 
     public val year: Int
     public val monthNumber: Int

core/commonTest/src/InstantTest.kt

@@ -103,7 +103,7 @@ class InstantTest {
             }
         }
 
-        val instant1 = LocalDateTime(2019, 10, 27, 2, 59, 0, 0).toInstant(zone)
+        val instant1 = LocalDateTime(2019, 10, 27, 2, 59).toInstant(zone)
         checkComponents(instant1.toLocalDateTime(zone), 2019, 10, 27, 2, 59)
 
         val instant2 = instant1.plus(DateTimePeriod(hours = 24), zone)

core/commonTest/src/LocalDateTimeTest.kt

@@ -101,7 +101,7 @@ class LocalDateTimeTest {
     }
 
     @Test
-    fun constructInvalidDate() = checkInvalidDate { year, month, day -> LocalDateTime(year, month, day, 0, 0, 0, 0).date }
+    fun constructInvalidDate() = checkInvalidDate { year, month, day -> LocalDateTime(year, month, day, 0, 0).date }
 
     @Test
     fun constructInvalidTime() {