Apply optimization flags

Author: ShotaKashihara

Sources/AtCoderLibrary/Command/New/Generator/PackageSwift.swift

@@ -15,7 +15,7 @@ struct PackageSwift: Generator {
         \(alphabets.sorted()
                     .map {
         """
-                .target(name: "\($0)"),
+                .target(name: "\($0)", swiftSettings: [.unsafeFlags(["-Ounchecked"])]),
                 .testTarget(name: "\($0)Tests", dependencies: ["\($0)", "TestLibrary"]),
         """
                     }

Tests/AtCoderLibraryTests/Command/New/Generator/PackageTests.swift

@@ -15,11 +15,11 @@ final class PackageTests: XCTestCase {
             name: "ABC001",
             dependencies: [],
             targets: [
-                .target(name: "A"),
+                .target(name: "A", swiftSettings: [.unsafeFlags(["-Ounchecked"])]),
                 .testTarget(name: "ATests", dependencies: ["A", "TestLibrary"]),
-                .target(name: "B"),
+                .target(name: "B", swiftSettings: [.unsafeFlags(["-Ounchecked"])]),
                 .testTarget(name: "BTests", dependencies: ["B", "TestLibrary"]),
-                .target(name: "C"),
+                .target(name: "C", swiftSettings: [.unsafeFlags(["-Ounchecked"])]),
                 .testTarget(name: "CTests", dependencies: ["C", "TestLibrary"]),
                 .target(name: "TestLibrary", path: "Tests/TestLibrary"),
             ]