Update copyright years to reflect first commit date

Updated 244 files to use the year each file was first committed
(tracking renames/moves but not copies) instead of the current year.

Author: cowwoc

annotation/src/main/java/io/github/cowwoc/requirements13/annotation/CheckReturnValue.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2021 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.annotation;

benchmark/assertj/src/test/java/io/github/cowwoc/requirements13/benchmark/assertj/AssertJTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2023 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.benchmark.assertj;

benchmark/guava/src/test/java/io/github/cowwoc/requirements13/benchmark/guava/GuavaTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2017 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.benchmark.guava;

benchmark/java/src/test/java/io/github/cowwoc/requirements13/benchmark/java/ExceptionTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2018 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.benchmark.java;

benchmark/java/src/test/java/io/github/cowwoc/requirements13/benchmark/java/GcTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2019 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.benchmark.java;

guava/src/main/java/io/github/cowwoc/requirements13/guava/DefaultGuavaValidators.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2023 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.guava;

guava/src/main/java/io/github/cowwoc/requirements13/guava/GuavaAssertThat.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2024 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.guava;

guava/src/main/java/io/github/cowwoc/requirements13/guava/GuavaCheckIf.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2023 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.guava;

guava/src/main/java/io/github/cowwoc/requirements13/guava/GuavaRequireThat.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2023 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.guava;

guava/src/main/java/io/github/cowwoc/requirements13/guava/GuavaValidators.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2026 Gili Tzabari
+ * Copyright (c) 2024 Gili Tzabari
  * Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0
  */
 package io.github.cowwoc.requirements13.guava;