Revert "Switch to Go modules"

This reverts commit 28cfbaf.

Gopkg.toml

@@ -0,0 +1,31 @@
+
+# Gopkg.toml example
+#
+# Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#  name = "github.com/x/y"
+#  version = "2.4.0"
+
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/kardianos/osext"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/keybase/go-ps"
+

go.mod

@@ -3,14 +3,13 @@ module github.com/google/gops
 go 1.12
 
 require (
-	github.com/StackExchange/wmi v0.0.0-20170410192909-ea383cf3ba6e // indirect
-	github.com/go-ole/go-ole v1.2.1 // indirect
+	github.com/StackExchange/wmi v0.0.0-20170410192909-ea383cf3ba6e
+	github.com/go-ole/go-ole v1.2.1
 	github.com/kardianos/osext v0.0.0-20170510131534-ae77be60afb1
 	github.com/keybase/go-ps v0.0.0-20161005175911-668c8856d999
 	github.com/shirou/gopsutil v0.0.0-20180427012116-c95755e4bcd7
-	github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect
-	github.com/stretchr/testify v1.3.0 // indirect
+	github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4
 	github.com/xlab/treeprint v0.0.0-20180616005107-d6fb6747feb6
-	golang.org/x/sys v0.0.0-20171017063910-8dbc5d05d6ed // indirect
+	golang.org/x/sys v0.0.0-20171017063910-8dbc5d05d6ed
 	rsc.io/goversion v1.0.0
 )