Default to incorrect behaviour in previous releases, decoding date from double

Author: Joannis

Sources/BSON/Codable/Decoding/BSONDecoderSettings.swift

@@ -158,7 +158,7 @@ public struct BSONDecoderSettings {
     /// If `true`, allows decoding ObjectIds from Strings if they're formatted as a 24-character hexString
     public var decodeObjectIdFromString: Bool = false
 
-    /// If `true`, allows decoding ObjectIds from Strings if they're formatted as a 24-character hexString
+    /// If `true`, allows decoding Date from a Double (TimeInterval)
     public var decodeDateFromTimestamp: Bool = true
 
     /// A strategy that is applied when encountering a request to decode a `Float`

Tests/BSONTests/BSONEncoderTests.swift

@@ -97,7 +97,7 @@ class BSONEncoderTests: XCTestCase {
         }
 
         let container = try BSONDecoder().decode(DateContainer.self, from: document)
-        XCTAssertEqual(date, container.date)
+        XCTAssertEqual(date.timeIntervalSince1970, container.date.timeIntervalSince1970)
     }
 
     @available(OSX 10.12, *)