Update license headers.

src/main/kotlin/ch/memobase/helpers/Activity.kt

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

src/main/kotlin/ch/memobase/helpers/Date.kt

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

src/main/kotlin/ch/memobase/helpers/GlobalTransformException.kt

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

src/main/kotlin/ch/memobase/helpers/KEYS.kt

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

src/main/kotlin/ch/memobase/helpers/LoadFile.kt

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

src/main/kotlin/ch/memobase/helpers/ValidationError.kt

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

src/main/kotlin/ch/memobase/model/ExtractCreationRelationName.kt

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

src/main/kotlin/ch/memobase/model/Facets.kt

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

src/main/kotlin/ch/memobase/model/GlobalTransform.kt

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

src/main/kotlin/ch/memobase/model/Labels.kt

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

src/main/kotlin/ch/memobase/model/LocalTransform.kt

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

src/main/kotlin/ch/memobase/model/NormalizeCarrierType.kt

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

src/main/kotlin/ch/memobase/model/NormalizeDate.kt

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

src/main/kotlin/ch/memobase/model/NormalizeGenre.kt

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

src/main/kotlin/ch/memobase/model/NormalizeLanguages.kt

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

src/main/kotlin/ch/memobase/model/NormalizePerson.kt

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

src/main/kotlin/ch/memobase/model/SplitEntity.kt

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

src/main/kotlin/ch/memobase/rdf/EnrichedConceptBuilder.kt

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

src/main/kotlin/ch/memobase/rdf/MemobaseModel.kt

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

src/main/kotlin/ch/memobase/rdf/RicoResource.kt

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