Update sourcegraph go-diff

Fixes #307.

Author: crsdrw

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/go-lintpack/lintpack v0.5.2
 	github.com/go-ole/go-ole v1.2.1 // indirect
 	github.com/gobwas/glob v0.2.3 // indirect
-	github.com/gogo/protobuf v1.0.0 // indirect
 	github.com/golang/mock v1.1.1
 	github.com/golangci/check v0.0.0-20180506172741-cfe4005ccda2
 	github.com/golangci/dupl v0.0.0-20180902072040-3e9179ac440a
@@ -42,8 +41,6 @@ require (
 	github.com/pkg/errors v0.8.0
 	github.com/shirou/gopsutil v0.0.0-20180427012116-c95755e4bcd7
 	github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 // indirect
-	github.com/shurcooL/go v0.0.0-20180423040247-9e1955d9fb6e // indirect
-	github.com/shurcooL/go-goon v0.0.0-20170922171312-37c2f522c041 // indirect
 	github.com/sirupsen/logrus v1.0.5
 	github.com/spf13/afero v1.1.0 // indirect
 	github.com/spf13/cast v1.2.0 // indirect
@@ -60,6 +57,5 @@ require (
 	mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed
 	mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b // indirect
 	mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34
-	sourcegraph.com/sourcegraph/go-diff v0.0.0-20171119081133-3f415a150aec
-	sourcegraph.com/sqs/pbtypes v0.0.0-20160107090929-4d1b9dc7ffc3 // indirect
+	sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455
 )

go.sum

@@ -36,6 +36,8 @@ github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
 github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/gogo/protobuf v1.0.0 h1:2jyBKDKU/8v3v2xVR2PtiWQviFUyiaGk2rpfyFT8rTM=
 github.com/gogo/protobuf v1.0.0/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/gogo/protobuf v1.1.1 h1:72R+M5VuhED/KujmZVcIquuo8mBgX4oVda//DQb3PXo=
+github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/mock v1.1.1 h1:G5FRp8JnTd7RQH5kemVNlMeyXQAztQ3mOWV95KxsXH8=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
@@ -189,5 +191,9 @@ mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34 h1:B1LAOfRqg2QUyCdzfjf46quTS
 mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
 sourcegraph.com/sourcegraph/go-diff v0.0.0-20171119081133-3f415a150aec h1:wAAdENPXC7bE1oxY4VqSDdhaA+XQ8TgQHsZMMnrXjEk=
 sourcegraph.com/sourcegraph/go-diff v0.0.0-20171119081133-3f415a150aec/go.mod h1:R09mWeb9JcPbO+A3cYDc11xjz0wp6r9+KnqdqROAoRU=
+sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455 h1:qoQ5Kt+Zm+GXBtz49YwD3juBhr/E0U25jO6bBzxW6NI=
+sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
 sourcegraph.com/sqs/pbtypes v0.0.0-20160107090929-4d1b9dc7ffc3 h1:hXy8YsgVLDz5mlngKhNHQhAsAGrSp3dlXZN4b0/4UUI=
 sourcegraph.com/sqs/pbtypes v0.0.0-20160107090929-4d1b9dc7ffc3/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
+sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4 h1:JPJh2pk3+X4lXAkZIk2RuE/7/FoK9maXw+TNPJhVS/c=
+sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=