Update requirements

REQUIREMENTS.md

@@ -8,6 +8,6 @@ Things I would like to be able to do with a simple API:
 - ✅ delete file --> remove unwanted files for cleanup, e.g. logfiles
 - ✅ merge file fragments --> insert partials into `README.md`
 - ✅ edit json file --> update `package.json` with standardized values
-- 🔳️ edit line-based file --> update `.gitignore`
+- ✅ edit line-based file --> update `.gitignore`
 - ✅ run shell commands in directory --> `yarn install`, `git fetch`, `yarn upgrade`, `sort-package-json`
 - ✅ get warned if something deviates from expectations --> no tests in `package.json`, missing license