Update sourcegraph/lib to pull it latest fixes (#621)

Author: mrnugget

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/pkg/browser v0.0.0-20180916011732-0a3d74bf9ce4
 	github.com/sourcegraph/go-diff v0.6.1
 	github.com/sourcegraph/jsonx v0.0.0-20200629203448-1a936bd500cf
-	github.com/sourcegraph/sourcegraph/lib v0.0.0-20210914094904-648e35b48ded
+	github.com/sourcegraph/sourcegraph/lib v0.0.0-20210920114500-3eabeb8208ef
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/xeipuuv/gojsonpointer v0.0.0-20190905194746-02993c407bfb // indirect
 	golang.org/x/net v0.0.0-20210614182718-04defd469f4e

go.sum

@@ -259,8 +259,8 @@ github.com/sourcegraph/go-diff v0.6.1 h1:hmA1LzxW0n1c3Q4YbrFgg4P99GSnebYa3x8gr0H
 github.com/sourcegraph/go-diff v0.6.1/go.mod h1:iBszgVvyxdc8SFZ7gm69go2KDdt3ag071iBaWPF6cjs=
 github.com/sourcegraph/jsonx v0.0.0-20200629203448-1a936bd500cf h1:oAdWFqhStsWiiMP/vkkHiMXqFXzl1XfUNOdxKJbd6bI=
 github.com/sourcegraph/jsonx v0.0.0-20200629203448-1a936bd500cf/go.mod h1:ppFaPm6kpcHnZGqQTFhUIAQRIEhdQDWP1PCv4/ON354=
-github.com/sourcegraph/sourcegraph/lib v0.0.0-20210914094904-648e35b48ded h1:otRtA0pYQ1CzcqQ/XJjPJ3HNAVP+MqyMQN5i0eUX8mA=
-github.com/sourcegraph/sourcegraph/lib v0.0.0-20210914094904-648e35b48ded/go.mod h1:9vLg5fQL9Q3iktfqu96OrswbOq7yqMesMJER9DCy8vk=
+github.com/sourcegraph/sourcegraph/lib v0.0.0-20210920114500-3eabeb8208ef h1:NVbGTt8WfgPflixd3d1AFKZt+UgOevTE3rUz+8HEM6A=
+github.com/sourcegraph/sourcegraph/lib v0.0.0-20210920114500-3eabeb8208ef/go.mod h1:9vLg5fQL9Q3iktfqu96OrswbOq7yqMesMJER9DCy8vk=
 github.com/sourcegraph/yaml v1.0.1-0.20200714132230-56936252f152 h1:z/MpntplPaW6QW95pzcAR/72Z5TWDyDnSo0EOcyij9o=
 github.com/sourcegraph/yaml v1.0.1-0.20200714132230-56936252f152/go.mod h1:GIjDIg/heH5DOkXY3YJ/wNhfHsQHoXGjl8G8amsYQ1I=
 github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=