feat(license): switch from WTFPL to MIT

LICENSE.txt

@@ -0,0 +1,7 @@
+Copyright 2013 Veit Lehmann
+
+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 the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -93,6 +93,9 @@ Tablets are also supported, both iPads and Android. The theme detects touch devi
 ### Is there a way to quickly switch between light and night mode?
 Yes, this theme is compatible with the [*toggle_night_mode* plugin by ltGuillaume](https://github.com/ltGuillaume/FeedMei/tree/main/plugins.local). If you selected either a regular or a *night* color variant, you can toggle back and forth by hitting `a N`. If you want your OS/browser to control this, select an *auto* color variant.
 
+### Why did you change the license?
+I want this theme to have a proper, well-recognized license to make it clear and easy for others to use this code as source or part of their work. In contrast to the previously used WTFPL, the MIT license is very popular, permissive, short and clear. Please include the license with the copyright notice in any copy or fork.
+
 ## Screenshots
 
 This is a selection to give you an impression of what to expect.

package.json

@@ -8,7 +8,7 @@
     "url": "https://github.com/levito/tt-rss-feedly-theme.git"
   },
   "author": "Veit Lehmann",
-  "license": "WTFPL",
+  "license": "MIT",
   "private": true,
   "scripts": {
     "build": "foreach -g 'src/!(_)*.less' -x 'lessc --source-map-inline #{path} > #{name}.css'",