fix: pass the SNMP timeout to gosnmp arguments (#84)

* I made the timeout feature of SNMP configurable with having a default value of 5 seconds. Also changed the tests to accommodate this change. Also corrected some typos.

* Adding the information about timeout flag in the README.md

* Passing the timeout parameter to the SNMPArguments. (#2)

trapsender/trap_sender.go

@@ -142,6 +142,7 @@ func (trapSender TrapSender) connect() (*snmpgo.SNMP, error) {
 	snmpArguments := snmpgo.SNMPArguments{
 		Address: trapSender.configuration.SNMPDestination,
 		Retries: trapSender.configuration.SNMPRetries,
+		Timeout: trapSender.configuration.SNMPTimeout,
 	}
 
 	if trapSender.configuration.SNMPVersion == "V2c" {