Upgrade: bump github.com/prometheus/client_golang from 1.4.0 to 1.4.1

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.4.0 to 1.4.1.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](prometheus/client_golang@v1.4.0...v1.4.1)

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

go.mod

@@ -2,7 +2,7 @@ module github.com/luzilla/dnsbl_exporter
 
 go 1.12
 
-require github.com/prometheus/client_golang v1.4.0
+require github.com/prometheus/client_golang v1.4.1
 
 require (
 	github.com/Luzilla/godnsbl v1.0.0

go.sum

@@ -66,6 +66,8 @@ github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.4.0 h1:YVIb/fVcOTMSqtqZWSKnHpSLBxu8DKgxq8z6RuBZwqI=
 github.com/prometheus/client_golang v1.4.0/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
+github.com/prometheus/client_golang v1.4.1 h1:FFSuS004yOQEtDdTq+TAOLP5xUq63KqAFYyOi8zA+Y8=
+github.com/prometheus/client_golang v1.4.1/go.mod h1:e9GMxYsXl05ICDXkRhurwBS4Q3OK1iX/F2sw+iXX5zU=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.2.0 h1:uq5h0d+GuxiXLJLNABMgp2qUWDPiLvgCzz2dUR+/W/M=