Fix the time overlap right boundary being included in the overlap

Fixes #403
Fixes #399

Author: dkhalanskyjb

core/common/test/TimeZoneTest.kt

@@ -281,6 +281,7 @@ private fun checkOverlap(timeZone: TimeZone, overlapStart: LocalDateTime) {
     val instantStart = overlapStart.plusNominalSeconds(-1).toInstant(timeZone).plus(1, DateTimeUnit.SECOND)
     // the later occurrence of the overlap
     val instantEnd = overlapStart.plusNominalSeconds(1).toInstant(timeZone).minus(1, DateTimeUnit.SECOND)
+    assertEquals(instantEnd, overlapStart.toInstant(timeZone))
     try {
         // there is at least a one-second overlap
         assertNotEquals(instantStart, instantEnd)

core/native/src/internal/TimeZoneRules.kt

@@ -167,7 +167,7 @@ internal class RecurringZoneRules(
             val ldtAfter = rule.transitionDateTime.toLocalDateTime(rule.offsetAfter)
             return if (localDateTime < ldtBefore && localDateTime < ldtAfter) {
                 OffsetInfo.Regular(rule.offsetBefore)
-            } else if (localDateTime > ldtBefore && localDateTime >= ldtAfter) {
+            } else if (localDateTime >= ldtBefore && localDateTime >= ldtAfter) {
                 offset = rule.offsetAfter
                 continue
             } else if (ldtAfter < ldtBefore) {