hep: update go.mod

go.mod

@@ -3,10 +3,10 @@ module go-hep.org/x/hep
 require (
 	github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802
 	github.com/ajstarks/svgo v0.0.0-20180226025133-644b8db467af
-	github.com/awalterschulze/gographviz v0.0.0-20180131143711-c45f112108a6
+	github.com/awalterschulze/gographviz v0.0.0-20180607045812-da5c847b6fb1
 	github.com/cznic/b v0.0.0-20180115125044-35e9bbe41f07
 	github.com/cznic/fileutil v0.0.0-20180108211300-6a051e75936f
-	github.com/cznic/internal v0.0.0-20170905175358-4747030f7cf2
+	github.com/cznic/internal v0.0.0-20180608152220-f44710a21d00
 	github.com/cznic/lldb v1.1.0
 	github.com/cznic/mathutil v0.0.0-20180504122225-ca4c9f2c1369
 	github.com/cznic/ql v1.1.0
@@ -24,18 +24,18 @@ require (
 	github.com/llgcode/draw2d v0.0.0-20180124133339-274031cf2abe
 	github.com/mattn/go-runewidth v0.0.2
 	github.com/pborman/uuid v0.0.0-20180122190007-c65b2f87fee3
-	github.com/peterh/liner v0.0.0-20180504030148-80ce870644db
+	github.com/peterh/liner v0.0.0-20180619022028-8c1271fcf47f
 	github.com/pierrec/lz4 v2.0.2
 	github.com/pierrec/xxHash v0.1.1
 	github.com/pkg/errors v0.8.0
 	github.com/sbinet/npyio v0.1.0
 	github.com/ulikunitz/xz v0.5.4
-	golang.org/x/crypto v0.0.0-20180531191117-5ba7f6308246
-	golang.org/x/exp v0.0.0-20180531145732-d20ef58a6d38
-	golang.org/x/image v0.0.0-20180403161127-f315e4403028
-	golang.org/x/mobile v0.0.0-20180522193631-5665cf37628b
-	golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b
-	gonum.org/v1/gonum v0.0.0-20180531044320-6ee525f5f29c
-	gonum.org/v1/plot v0.0.0-20180521182508-f00cfa244b51
+	golang.org/x/crypto v0.0.0-20180617042118-027cca12c2d6
+	golang.org/x/exp v0.0.0-20180604040759-f5f346835693
+	golang.org/x/image v0.0.0-20180601115456-af66defab954
+	golang.org/x/mobile v0.0.0-20180618222554-6621de06e1e9
+	golang.org/x/tools v0.0.0-20180618171013-53440098a4ee
+	gonum.org/v1/gonum v0.0.0-20180617212200-5530c0a23a8e
+	gonum.org/v1/plot v0.0.0-20180613020117-3f55ce2422a7
 	rsc.io/pdf v0.1.1
 )