Bump github.com/mackerelio/mkr from 0.54.0 to 0.55.0 in /wix

Bumps [github.com/mackerelio/mkr](https://github.com/mackerelio/mkr) from 0.54.0 to 0.55.0.
- [Release notes](https://github.com/mackerelio/mkr/releases)
- [Changelog](https://github.com/mackerelio/mkr/blob/master/CHANGELOG.md)
- [Commits](mackerelio/mkr@v0.54.0...v0.55.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

wix/go.mod

@@ -5,7 +5,7 @@ go 1.17
 require (
 	github.com/mackerelio/go-check-plugins v0.46.1
 	github.com/mackerelio/mackerel-agent-plugins v0.81.0
-	github.com/mackerelio/mkr v0.54.0
+	github.com/mackerelio/mkr v0.55.0
 	github.com/mattn/go-encoding v0.0.2
 	golang.org/x/sys v0.17.0
 )

wix/go.sum

@@ -1333,8 +1333,8 @@ github.com/mackerelio/mackerel-client-go v0.29.0 h1:GGLQZ4oco7tdIV6BZGVMxNLyU95L
 github.com/mackerelio/mackerel-client-go v0.29.0/go.mod h1:b4qVMQi+w4rxtKQIFycLWXNBtIi9d0r571RzYmg/aXo=
 github.com/mackerelio/mackerel-plugin-mongodb v1.1.1/go.mod h1:A5rpmvlCJujZNVxPtJFz6jJEXRTnZ3bSkbiBDgt+ILs=
 github.com/mackerelio/mackerel-plugin-mysql v1.2.2/go.mod h1:qOSQPnPXnZyJVBsUDjML1wG1kVrcmbYLzjZ1Tcsq1kk=
-github.com/mackerelio/mkr v0.54.0 h1:t1TmR82tG9jgN62XcqmwGabh+ymTT+YZrLOclgqmMWg=
-github.com/mackerelio/mkr v0.54.0/go.mod h1:WKVg131Uc4j8fwOwC2JK+aIWQtn6PDQrq/lZeIpcK+g=
+github.com/mackerelio/mkr v0.55.0 h1:Kqr/DZstEzpqHx6x3s9ZEwoPZLxrCZTUq4ETEXhrSUo=
+github.com/mackerelio/mkr v0.55.0/go.mod h1:dzmoN/bINI7uk4Qly8vvMG6fni43H+R0ZsZdDDZRiOs=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/magiconair/properties v1.8.1/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mailru/easyjson v0.0.0-20160728113105-d5b7844b561a/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=