Add todotxt in file handling section
@@ -742,6 +742,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
* [skywalker](https://github.com/dixonwille/skywalker) - Package to allow one to concurrently go through a filesystem with ease.
* [stl](https://gitlab.com/russoj88/stl) - Modules to read and write STL (stereolithography) files. Concurrent algorithm for reading.
* [tarfs](https://github.com/posener/tarfs) - Implementation of the [`FileSystem` interface](https://godoc.org/github.com/kr/fs#FileSystem) for tar files.
+* [todotxt](https://github.com/1set/todotxt) - Go library for Gina Trapani's [*todo.txt*](http://todotxt.org/) files, supports parsing and manipulating of task lists in the [*todo.txt* format](https://github.com/todotxt/todo.txt).
* [vfs](https://github.com/C2FO/vfs) - A pluggable, extensible, and opinionated set of filesystem functionality for Go across a number of filesystem types such as os, S3, and GCS.
## Financial
