Fix tests

Author: kaishin

Sources/SwiftFSRS/Schedulers/LongTermScheduler.swift

@@ -162,6 +162,6 @@ public struct LongTermScheduler: Scheduler {
       }
     }
 
-    return CardReview(card: newCard, oldCard: card, rating: reviewRating)
+    return CardReview(postReviewCard: newCard, preReviewCard: card, rating: reviewRating)
   }
 }

Sources/SwiftFSRS/Schedulers/ShortTermScheduler.swift

@@ -166,6 +166,6 @@ public struct ShortTermScheduler: Scheduler {
       }
     }
 
-    return CardReview(card: newCard, oldCard: card, rating: reviewRating)
+    return CardReview(postReviewCard: newCard, preReviewCard: card, rating: reviewRating)
   }
 }

Tests/SwiftFSRSTests/LongTermSchedulerTests.swift

@@ -106,7 +106,7 @@ final class LongTermSchedulerTests: XCTestCase {
         reviewTime: previousCard.due
       )
 
-      reviewCards.append(review.card)
+      reviewCards.append(review.postReviewCard)
     }
 
     return reviewCards

Tests/SwiftFSRSTests/ShortTermSchedulerTests.swift

@@ -106,7 +106,7 @@ final class ShortTermSchedulerTests: XCTestCase {
         reviewTime: previousCard.due
       )
 
-      reviewCards.append(review.card)
+      reviewCards.append(review.postReviewCard)
     }
 
     return reviewCards