Bump github.com/stretchr/testify from 1.8.4 to 1.9.0

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.8.4 to 1.9.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](stretchr/testify@v1.8.4...v1.9.0)

---
updated-dependencies:
- dependency-name: github.com/stretchr/testify
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -1,33 +1,16 @@
 module github.com/insomniacslk/irc-slack
 
 require (
-	github.com/bketelsen/crypt v0.0.3-0.20200106085610-5cbc8cc4026c // indirect
 	github.com/chromedp/cdproto v0.0.0-20240102194822-c006b26f21c7
 	github.com/chromedp/chromedp v0.9.3
 	github.com/coredhcp/coredhcp v0.0.0-20231020075302-1cd0fca8759a
-	github.com/coredhcp/plugins v0.0.0-20191121175107-a201c0b24a48 // indirect
 	github.com/gobwas/ws v1.3.2 // indirect
-	github.com/golangci/golangci-lint v1.21.0 // indirect
-	github.com/gomodule/redigo v2.0.0+incompatible // indirect
 	github.com/gorilla/websocket v1.5.1 // indirect
-	github.com/knq/sysutil v0.0.0-20191005231841-15668db23d08 // indirect
-	github.com/lusis/go-slackbot v0.0.0-20180109053408-401027ccfef5 // indirect
-	github.com/lusis/slack-test v0.0.0-20190426140909-c40012f20018 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7 // indirect
-	github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065 // indirect
-	github.com/pelletier/go-toml v1.8.1 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
 	github.com/sirupsen/logrus v1.9.3
 	github.com/slack-go/slack v0.12.3
 	github.com/spf13/pflag v1.0.6-0.20201009195203-85dd5c8bc61c
-	github.com/stretchr/testify v1.8.4
-	github.com/u-root/u-root v7.0.0+incompatible // indirect
-	github.com/willf/bitset v1.1.11 // indirect
-	golang.org/x/crypto v0.18.0
+	github.com/stretchr/testify v1.9.0
 	golang.org/x/net v0.20.0 // indirect
-	golang.org/x/term v0.16.0
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 go 1.14