Bump golang.org/x/mod from 0.4.1 to 0.4.2

Bumps [golang.org/x/mod](https://github.com/golang/mod) from 0.4.1 to 0.4.2.
- [Release notes](https://github.com/golang/mod/releases)
- [Commits](golang/mod@v0.4.1...v0.4.2)

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

go.mod

@@ -7,6 +7,6 @@ require (
 	github.com/go-xmlfmt/xmlfmt v0.0.0-20191208150333-d5b6f63a941b
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/phayes/checkstyle v0.0.0-20170904204023-bfd46e6a821d
-	golang.org/x/mod v0.4.1
+	golang.org/x/mod v0.4.2
 	gopkg.in/yaml.v2 v2.4.0
 )

go.sum

@@ -8,9 +8,8 @@ github.com/phayes/checkstyle v0.0.0-20170904204023-bfd46e6a821d h1:CdDQnGF8Nq9oc
 github.com/phayes/checkstyle v0.0.0-20170904204023-bfd46e6a821d/go.mod h1:3OzsM7FXDQlpCiw2j81fOmAwQLnZnLGXVKUzeKQXIAw=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/mod v0.4.0 h1:8pl+sMODzuvGJkmj2W4kZihvVb5mKm8pB/X44PIQHv8=
-golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=