update README
update README

dreamseekerkun/mixpanel-android,engvik/mixpanel-android,mixpanel/mixpanel-android,omadahealth/mixpanel-android,omadahealth/mixpanel-android,mixpanel/mixpanel-android,dreamseekerkun/mixpanel-android,engvik/mixpanel-android,mixpanel/mixpanel-android,erpragatisingh/mixpanel-android,engvik/mixpanel-android,dreamseekerkun/mixpanel-android,erpragatisingh/mixpanel-android,omadahealth/mixpanel-android,erpragatisingh/mixpanel-android