added awesome-go badge

Author: prashantgupta24

README.md

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 # Activity tracker
 
-[![codecov](https://codecov.io/gh/prashantgupta24/activity-tracker/branch/master/graph/badge.svg)](https://codecov.io/gh/prashantgupta24/activity-tracker) [![Go Report Card](https://goreportcard.com/badge/github.com/prashantgupta24/activity-tracker)](https://goreportcard.com/report/github.com/prashantgupta24/activity-tracker) [![version][version-badge]][RELEASES]
+[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go) [![codecov](https://codecov.io/gh/prashantgupta24/activity-tracker/branch/master/graph/badge.svg)](https://codecov.io/gh/prashantgupta24/activity-tracker) [![Go Report Card](https://goreportcard.com/badge/github.com/prashantgupta24/activity-tracker)](https://goreportcard.com/report/github.com/prashantgupta24/activity-tracker) [![version][version-badge]][RELEASES]
 
 It is a libary that lets you monitor certain activities on your machine, and then sends a [heartbeat](https://github.com/prashantgupta24/activity-tracker#heartbeat-struct) at a periodic (configurable) time detailing all the activity changes during that time. The activities that you want to track are monitored by **pluggable** handlers for those activities and can be added or removed according to your needs. An example of an activity is `MouseCursorActivity`, i.e. whether your mouse cursor was moved or not.