Update bluekeyes/go-gitdiff to v0.5.1

Author: bluekeyes

go.mod

@@ -3,7 +3,7 @@ module github.com/bluekeyes/patch2pr
 go 1.14
 
 require (
-	github.com/bluekeyes/go-gitdiff v0.5.0
+	github.com/bluekeyes/go-gitdiff v0.5.1
 	github.com/google/go-github/v33 v33.0.0
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 )

go.sum

@@ -1,6 +1,8 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/bluekeyes/go-gitdiff v0.5.0 h1:AXrIoy/VEA9Baz2lhwMlpdzDJ/sKof6C9yTt1oqw4hQ=
 github.com/bluekeyes/go-gitdiff v0.5.0/go.mod h1:QpfYYO1E0fTVHVZAZKiRjtSGY9823iCdvGXBcEzHGbM=
+github.com/bluekeyes/go-gitdiff v0.5.1 h1:nb0/nbk4SGxK80taUG+gKjOpUYhpkVxqDRULlMLsWng=
+github.com/bluekeyes/go-gitdiff v0.5.1/go.mod h1:QpfYYO1E0fTVHVZAZKiRjtSGY9823iCdvGXBcEzHGbM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=