Add Timespan package
* Add Timespan package
Timespan is a Go library for interacting with intervals of time, defined as a start time and a duration.
* Alphabetical order
@@ -409,6 +409,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
* [goweek](https://github.com/grsmv/goweek) - Library for working with week entity in golang.
* [now](https://github.com/jinzhu/now) - Now is a time toolkit for golang.
* [NullTime](https://github.com/kirillDanshin/nulltime) - Nullable `time.Time`.
+* [timespan](https://github.com/SaidinWoT/timespan) - For interacting with intervals of time, defined as a start time and a duration.
* [timeutil](https://github.com/leekchan/timeutil) - Useful extensions (Timedelta, Strftime, ...) to the golang's time package.
* [tuesday](https://github.com/osteele/tuesday) - Ruby-compatible Strftime function.
