Bump github.com/lib/pq from 1.7.1 to 1.8.0

Bumps [github.com/lib/pq](https://github.com/lib/pq) from 1.7.1 to 1.8.0.
- [Release notes](https://github.com/lib/pq/releases)
- [Commits](lib/pq@v1.7.1...v1.8.0)

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

go.mod

@@ -30,7 +30,7 @@ require (
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/lestrrat-go/tcptest v0.0.0-20180223004312-f0345789c593
 	github.com/lestrrat-go/tcputil v0.0.0-20180223003554-d3c7f98154fb // indirect
-	github.com/lib/pq v1.7.1
+	github.com/lib/pq v1.8.0
 	github.com/mackerelio/go-mackerel-plugin v0.0.0-20200416053722-b68096c191d0
 	github.com/mackerelio/go-mackerel-plugin-helper v0.0.0-20200416053706-9aba6664c25d
 	github.com/mackerelio/go-osstat v0.1.0

go.sum

@@ -211,6 +211,8 @@ github.com/lib/pq v1.7.0 h1:h93mCPfUSkaul3Ka/VG8uZdmW1uMHDGxzu0NWHuJmHY=
 github.com/lib/pq v1.7.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.7.1 h1:FvD5XTVTDt+KON6oIoOmHq6B6HzGuYEhuTMpEG0yuBQ=
 github.com/lib/pq v1.7.1/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+github.com/lib/pq v1.8.0 h1:9xohqzkUwzR4Ga4ivdTcawVS89YSDVxXMa3xJX3cGzg=
+github.com/lib/pq v1.8.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/mackerelio/go-mackerel-plugin v0.0.0-20200416053722-b68096c191d0 h1:leArxbMXSYfmdnoCg/9tmFa0uIeaa+K7vjF+hRjc4FY=
 github.com/mackerelio/go-mackerel-plugin v0.0.0-20200416053722-b68096c191d0/go.mod h1:hV+0M18+q787IEDQhLficGPJoEfx0JbPuhqmU1z7l/M=
 github.com/mackerelio/go-mackerel-plugin-helper v0.0.0-20200416053706-9aba6664c25d h1:PSunsAhVzer4mAjkuABcrA7S0y4iC8ymtvAjJeASXCU=