Bump github.com/mackerelio/mackerel-agent from 0.67.1 to 0.68.0

Bumps [github.com/mackerelio/mackerel-agent](https://github.com/mackerelio/mackerel-agent) from 0.67.1 to 0.68.0.
- [Release notes](https://github.com/mackerelio/mackerel-agent/releases)
- [Changelog](https://github.com/mackerelio/mackerel-agent/blob/master/CHANGELOG.md)
- [Commits](mackerelio/mackerel-agent@v0.67.1...v0.68.0)

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

go.mod

@@ -19,7 +19,7 @@ require (
 	github.com/jpillora/backoff v0.0.0-20180909062703-3050d21c67d7
 	github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 // indirect
 	github.com/mackerelio/checkers v0.0.0-20190411030116-60cbd7b55456
-	github.com/mackerelio/mackerel-agent v0.67.1
+	github.com/mackerelio/mackerel-agent v0.68.0
 	github.com/mackerelio/mackerel-client-go v0.9.1
 	github.com/mholt/archiver v3.1.1+incompatible
 	github.com/motemen/go-colorine v0.0.0-20180816141035-45d19169413a

go.sum

@@ -75,6 +75,8 @@ github.com/mackerelio/golib v1.0.0 h1:wiJv4l8xU9jmMn/JZV6gfpJeLUQxVFG0kVFWnsoF9w
 github.com/mackerelio/golib v1.0.0/go.mod h1:Udb4zyFG2ui7TNTMOX8In0U8AT4woLu53/46ncRwNzE=
 github.com/mackerelio/mackerel-agent v0.67.1 h1:4qi5ekqrKDfqfiDqRy0u56Ru96H8I97vKQHCu5kK/pk=
 github.com/mackerelio/mackerel-agent v0.67.1/go.mod h1:ah+B4tTJz8H2m4VfQnONAkD7piLXPR2zcMQdH9oFLxU=
+github.com/mackerelio/mackerel-agent v0.68.0 h1:GVgb8rEuAZOf2qIRYukp6C02LiUA3U3bgLMrcpBz9mU=
+github.com/mackerelio/mackerel-agent v0.68.0/go.mod h1:dXf9hLn93htJhgQQWrmrwk82i+CO+wKT8BJBl+WSjhs=
 github.com/mackerelio/mackerel-client-go v0.9.1 h1:IkH7EZMCmu/PWStwSq+ICfwNLGGNSXfSE24ar4eVDCc=
 github.com/mackerelio/mackerel-client-go v0.9.1/go.mod h1:/FVnUK7nsg/MEBpIVOCZLYzdIwY5mg/SyAlXDnxVcAI=
 github.com/mattn/go-colorable v0.1.1/go.mod h1:FuOcm+DKB9mbwrcAfNl7/TZVBZ6rcnceauSikq3lYCQ=
@@ -118,6 +120,8 @@ github.com/sergi/go-diff v1.0.0 h1:Kpca3qRNrduNnOQeazBd0ysaKrUJiIuISHxogkT9RPQ=
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
 github.com/shirou/gopsutil v2.20.2+incompatible h1:ucK79BhBpgqQxPASyS2cu9HX8cfDVljBN1WWFvbNvgY=
 github.com/shirou/gopsutil v2.20.2+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+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/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=