Add CHANGELOG file and updated LICENSE years

CHANGELOG.md

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+# nextDESIGN v9
+
+## Version 9.4 (2021-08-18)
+
+- Adjusted font sizes
+- Justified text alignment
+- Make "read more posts" link on main page a button
+- Get about text through variable
+- Rework "commenting" system
+
+## Version 9.3 (2021-05-04)
+
+- Added Plausible analytics script
+- Switched monospace font from Hermit to JetBrains Mono
+
+## Version 9.2 (2020-09-23)
+
+- Provide dark color scheme
+
+## Version 9.1.1 (2020-08-29)
+
+- Add link to Gitea
+- Reorder "other places" section
+
+## Version 9.1 (2020-05-15)
+
+- Initial release

LICENSE

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 The MIT License (MIT)
 
-Copyright (c) 2020 Marcel Kapfer
+Copyright (c) 2020-2021 Marcel Kapfer
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of
 this software and associated documentation files (the "Software"), to deal in