Updates license date to 2021 (#6378)

samples/sample_binary.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/ByteBuffer.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Constants.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/FlatBufferBuilder.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/FlatBufferObject.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/FlatBuffersUtils.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Int+extension.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Message.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Mutable.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Offset.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Struct.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/Table.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

swift/Sources/FlatBuffers/UnionObject.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Benchmarks.swift/Sources/FlatBuffers.Benchmarks.swift/main.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.GRPC.Swift/Sources/client/main.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.GRPC.Swift/Sources/server/main.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Sources/SwiftFlatBuffers/main.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersMonsterWriterTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersStructsTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersUnionTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersVectorsTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatbuffersDoubleTests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/XCTestManifests.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

tests/FlatBuffers.Test.Swift/Tests/LinuxMain.swift

 /*
- * Copyright 2020 Google Inc. All rights reserved.
+ * Copyright 2021 Google Inc. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.