Add SwiftLint and fix lint warnings

YetiUITests/YetiUITests.swift

@@ -15,7 +15,8 @@ final class YetiUITests: XCTestCase {
         // In UI tests it is usually best to stop immediately when a failure occurs.
         continueAfterFailure = false
 
-        // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this.
+        // In UI tests it’s important to set the initial state - such as interface orientation - required for your
+        // tests before they run. The setUp method is a good place to do this.
     }
 
     override func tearDownWithError() throws {

YetiUITests/YetiUITestsLaunchTests.swift

@@ -9,7 +9,7 @@ import XCTest
 
 final class YetiUITestsLaunchTests: XCTestCase {
 
-    override class var runsForEachTargetApplicationUIConfiguration: Bool {
+    override static var runsForEachTargetApplicationUIConfiguration: Bool {
         true
     }