Updates robfig/cron to v3 (#114)

I saw some discussions about this, but I think that its best to fix this library version and use standard cron syntax.

* Updates go to 1.13 on circle ci

Author: fabioxgn

.circleci/config.yml

@@ -2,9 +2,7 @@ version: 2
 jobs:
   build:
     docker:
-      - image: circleci/golang:1.11
-        environment:
-          GO111MODULE: "on"      
+      - image: circleci/golang:1.13
     working_directory: /go/src/github.com/go-chat-bot/bot
     steps:
       - checkout

bot.go

@@ -7,7 +7,7 @@ import (
 	"math/rand"
 	"time"
 
-	"github.com/robfig/cron"
+	"github.com/robfig/cron/v3"
 )
 
 const (

cmd_test.go

@@ -92,7 +92,7 @@ func TestPeriodicCommands(t *testing.T) {
 	reset()
 	RegisterPeriodicCommand("morning",
 		PeriodicConfig{
-			CronSpec: "0 0 08 * * mon-fri",
+			CronSpec: "0 08 * * mon-fri",
 			Channels: []string{"#channel"},
 			CmdFunc:  func(channel string) (string, error) { return "ok " + channel, nil },
 		})
@@ -122,13 +122,13 @@ func TestMultiplePeriodicCommands(t *testing.T) {
 	reset()
 	RegisterPeriodicCommand("morning",
 		PeriodicConfig{
-			CronSpec: "0 0 08 * * mon-fri",
+			CronSpec: "0 08 * * mon-fri",
 			Channels: []string{"#channel"},
 			CmdFunc:  func(channel string) (string, error) { return "ok_morning " + channel, nil },
 		})
 	RegisterPeriodicCommand("afternoon",
 		PeriodicConfig{
-			CronSpec: "0 0 12 * * mon-fri",
+			CronSpec: "0 12 * * mon-fri",
 			Channels: []string{"#channel"},
 			CmdFunc:  func(channel string) (string, error) { return "ok_afternoon " + channel, nil },
 		})
@@ -170,7 +170,7 @@ func TestErroredPeriodicCommand(t *testing.T) {
 	reset()
 	RegisterPeriodicCommand("bugged",
 		PeriodicConfig{
-			CronSpec: "0 0 08 * * mon-fri",
+			CronSpec: "0 08 * * mon-fri",
 			Channels: []string{"#channel"},
 			CmdFunc:  func(channel string) (string, error) { return "bug", errors.New("error") },
 		})
@@ -198,7 +198,7 @@ func TestPeriodicCommandsV2(t *testing.T) {
 	reset()
 	RegisterPeriodicCommandV2("morning",
 		PeriodicConfig{
-			CronSpec: "0 0 08 * * mon-fri",
+			CronSpec: "0 08 * * mon-fri",
 			CmdFuncV2: func() ([]CmdResult, error) {
 				ret := []CmdResult{
 					{Message: "message 1", Channel: "#channel1"},
@@ -253,7 +253,7 @@ func TestErroredPeriodicCommandsV2(t *testing.T) {
 	reset()
 	RegisterPeriodicCommandV2("morning",
 		PeriodicConfig{
-			CronSpec: "0 0 08 * * mon-fri",
+			CronSpec: "0 08 * * mon-fri",
 			CmdFuncV2: func() ([]CmdResult, error) {
 				return nil, errors.New("error")
 			},

go.mod

@@ -17,7 +17,7 @@ require (
 	github.com/nlopes/slack v0.5.0
 	github.com/pkg/errors v0.8.0 // indirect
 	github.com/pyinx/gorocket v0.0.0-20170810024322-78ae1353729f
-	github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967
+	github.com/robfig/cron/v3 v3.0.0
 	github.com/technoweenie/multipartstreamer v1.0.1 // indirect
 	github.com/thoj/go-ircevent v0.0.0-20180816043103-14f3614f28c3
 	github.com/trivago/tgo v1.0.5 // indirect
@@ -30,3 +30,5 @@ require (
 	google.golang.org/genproto v0.0.0-20181109154231-b5d43981345b // indirect
 	gopkg.in/telegram-bot-api.v3 v3.0.0
 )
+
+go 1.13

go.sum

@@ -40,6 +40,8 @@ github.com/mozillazg/go-unidecode v0.1.0 h1:wAIMDf/yTexXKxT5TkctLwmClGSyuoJaZDRM
 github.com/mozillazg/go-unidecode v0.1.0/go.mod h1:fYMdhyjni9ZeEmS6OE/GJHDLsF8TQvIVDwYR/drR26Q=
 github.com/nlopes/slack v0.4.0 h1:OVnHm7lv5gGT5gkcHsZAyw++oHVFihbjWbL3UceUpiA=
 github.com/nlopes/slack v0.4.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
+github.com/nlopes/slack v0.5.0 h1:NbIae8Kd0NpqaEI3iUrsuS0KbcEDhzhc939jLW5fNm0=
+github.com/nlopes/slack v0.5.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
 github.com/openzipkin/zipkin-go v0.1.1/go.mod h1:NtoC/o8u3JlF1lSlyPNswIbeQH9bJTmOf0Erfk+hxe8=
 github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -51,6 +53,9 @@ github.com/pyinx/gorocket v0.0.0-20170810024322-78ae1353729f h1:N1r6pSlez3lLsqaN
 github.com/pyinx/gorocket v0.0.0-20170810024322-78ae1353729f/go.mod h1:nh/AiOs8vRCaqnSOHVzyta23ZLm5ck/st4brrxtQJEo=
 github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967 h1:x7xEyJDP7Hv3LVgvWhzioQqbC/KtuUhTigKlH/8ehhE=
 github.com/robfig/cron v0.0.0-20180505203441-b41be1df6967/go.mod h1:JGuDeoQd7Z6yL4zQhZ3OPEVHB7fL6Ka6skscFHfmt2k=
+github.com/robfig/cron v1.2.0 h1:ZjScXvvxeQ63Dbyxy76Fj3AT3Ut0aKsyd2/tl3DTMuQ=
+github.com/robfig/cron/v3 v3.0.0 h1:kQ6Cb7aHOHTSzNVNEhmp8EcWKLb4CbiMW9h9VyIhO4E=
+github.com/robfig/cron/v3 v3.0.0/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/technoweenie/multipartstreamer v1.0.1 h1:XRztA5MXiR1TIRHxH2uNxXxaIkKQDeX7m2XsSOlQEnM=
 github.com/technoweenie/multipartstreamer v1.0.1/go.mod h1:jNVxdtShOxzAsukZwTSw6MDx5eUJoiEBsSvzDU9uzog=
 github.com/thoj/go-ircevent v0.0.0-20180816043103-14f3614f28c3 h1:389FrrKIAlxqQMTscCQ7VH3JAVuxb/pe53v2LBiA7z8=