Upgrade gopsutil to 2.20.4 (#912)

go.mod

@@ -41,7 +41,7 @@ require (
 	github.com/prometheus/prometheus v1.8.2-0.20190924101040-52e0504f83ea
 	github.com/rs/cors v1.6.0
 	github.com/securego/gosec v0.0.0-20200316084457-7da9f46445fd
-	github.com/shirou/gopsutil v0.0.0-20190901111213-e4ec7b275ada
+	github.com/shirou/gopsutil v2.20.4+incompatible
 	github.com/sirupsen/logrus v1.5.0 // indirect
 	github.com/soheilhy/cmux v0.1.4
 	github.com/spf13/cast v1.3.1

go.sum

@@ -1013,6 +1013,8 @@ github.com/serenize/snaker v0.0.0-20171204205717-a683aaf2d516/go.mod h1:Yow6lPLS
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
 github.com/shirou/gopsutil v0.0.0-20190901111213-e4ec7b275ada h1:WokF3GuxBeL+n4Lk4Fa8v9mbdjlrl7bHuneF4N1bk2I=
 github.com/shirou/gopsutil v0.0.0-20190901111213-e4ec7b275ada/go.mod h1:WWnYX4lzhCH5h/3YBfyVA3VbLYjlMZZAQcW9ojMexNc=
+github.com/shirou/gopsutil v2.20.4+incompatible h1:cMT4rxS55zx9NVUnCkrmXCsEB/RNfG9SwHY9evtX8Ng=
+github.com/shirou/gopsutil v2.20.4+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 h1:udFKJ0aHUL60LboW/A+DfgoHVedieIzIXE8uylPue0U=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4/go.mod h1:qsXQc7+bwAM3Q1u/4XEfrquwF8Lw7D7y5cD8CuHnfIc=
 github.com/shopspring/decimal v0.0.0-20180709203117-cd690d0c9e24/go.mod h1:M+9NzErvs504Cn4c5DxATwIqPbtswREoFCre64PpcG4=