Fix relative time test

Closes: #218

damusTests/TimeAgoTests.swift

@@ -18,11 +18,11 @@ final class TimeAgoTests: XCTestCase {
         XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-2), calendar), "now")
         XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-3), calendar), "3s")
         XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-59), calendar), "59s")
-        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-60), calendar), "1min")
-        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-3599), calendar), "59min")
-        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-3600), calendar), "1h")
-        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-86399), calendar), "23h")
-        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-86400), calendar), "1d")
+        XCTAssertEqual(time_ago_since(Date.now.addingTimeInterval(-60), calendar), "1m")
+        XCTAssertEqual(time_ago_since(calendar.date(byAdding: .hour, value: -1, to: Date.now)!.addingTimeInterval(1), calendar), "59m")
+        XCTAssertEqual(time_ago_since(calendar.date(byAdding: .hour, value: -1, to: Date.now)!, calendar), "1h")
+        XCTAssertEqual(time_ago_since(calendar.date(byAdding: .day, value: -1, to: Date.now)!.addingTimeInterval(1), calendar), "23h")
+        XCTAssertEqual(time_ago_since(calendar.date(byAdding: .day, value: -1, to: Date.now)!, calendar), "1d")
         XCTAssertEqual(time_ago_since(calendar.date(byAdding: .weekOfMonth, value: -1, to: Date.now)!.addingTimeInterval(1), calendar), "6d")
         XCTAssertEqual(time_ago_since(calendar.date(byAdding: .weekOfMonth, value: -1, to: Date.now)!, calendar), "1w")
         XCTAssertEqual(time_ago_since(calendar.date(byAdding: .weekOfMonth, value: -2, to: Date.now)!, calendar), "2w")