Unfortunately licensee also looks at the COPYRIGHT.txt file and detects it as "other".
GitHub therefore still doesn't add the correct license to the project. This is
however a step in the right direction.

Before:
$ licensee LICENSE.txt
License: Other
Matched files: ["LICENSE.txt"]
LICENSE.txt:
  Content hash: 8dd7a8f24846f434ce7fdb96f6440909b5469277
  Attribution: Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.
  License: Other

After:
$ licensee LICENSE.txt
License: MIT License
Matched files: ["LICENSE.txt"]
LICENSE.txt:
  Content hash: d64f3bb4282a97b37454b5bb96a8a264a3363dc3
  Attribution: Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.
  Confidence: 100.00%
  Matcher: Licensee::Matchers::Exact
  License: MIT License