Actual project license?

[khitrin]

README.md states MIT license, but LICENSE file and source file headers are GPLv3.

Odd indeed. According to the license headers in actual source files it's GPL so I guess README needs fixing.
While at it, would be nice to add https://spdx.org/licenses/ tags support to avoid further confusion.

[Bazist]

Fixed, Thanks

Neat, thanks. On a related note: license headers mention "VyMa\Trie" software but the project name is HArray. It might be worth it to add clarification note to readme.

[Bazist]

Neat, thanks. On a related note: license headers mention "VyMa\Trie" software but the project name is HArray. It might be worth it to add clarification note to readme.

Fixed, Thanks.
I think HArray name is better than VyMa\Trie.
Also I am going to come back to the project in soon time to improve current version.