upgrade to use testfixtures v3 (#11904)

* upgrade to use testfixtures v3

* simplify logic

* make vendor

* update per @lunny

* Update templates/repo/empty.tmpl

* Update templates/repo/empty.tmpl

Co-authored-by: Lauris BH <lauris@nix.lv>

go.mod

@@ -44,6 +44,7 @@ require (
 	github.com/go-redis/redis v6.15.2+incompatible
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/go-swagger/go-swagger v0.21.0
+	github.com/go-testfixtures/testfixtures/v3 v3.2.0
 	github.com/gobwas/glob v0.2.3
 	github.com/gogs/chardet v0.0.0-20191104214054-4b6791f73a28
 	github.com/gogs/cron v0.0.0-20171120032916-9f6c956d3e14
@@ -56,7 +57,6 @@ require (
 	github.com/issue9/identicon v1.0.1
 	github.com/jaytaylor/html2text v0.0.0-20160923191438-8fb95d837f7d
 	github.com/jmhodges/levigo v1.0.0 // indirect
-	github.com/joho/godotenv v1.3.0 // indirect
 	github.com/kballard/go-shellquote v0.0.0-20170619183022-cd60e84ee657
 	github.com/keybase/go-crypto v0.0.0-20200123153347-de78d2cb44f4
 	github.com/klauspost/compress v1.10.2
@@ -66,8 +66,7 @@ require (
 	github.com/mailru/easyjson v0.7.0 // indirect
 	github.com/markbates/goth v1.61.2
 	github.com/mattn/go-isatty v0.0.11
-	github.com/mattn/go-oci8 v0.0.0-20190320171441-14ba190cf52d // indirect
-	github.com/mattn/go-sqlite3 v1.11.0
+	github.com/mattn/go-sqlite3 v2.0.2+incompatible
 	github.com/mcuadros/go-version v0.0.0-20190308113854-92cdf37c5b75
 	github.com/mgechev/dots v0.0.0-20190921121421-c36f7dcfbb81
 	github.com/mgechev/revive v1.0.2
@@ -115,8 +114,7 @@ require (
 	gopkg.in/gomail.v2 v2.0.0-20160411212932-81ebce5c23df
 	gopkg.in/ini.v1 v1.52.0
 	gopkg.in/ldap.v3 v3.0.2
-	gopkg.in/testfixtures.v2 v2.5.0
-	gopkg.in/yaml.v2 v2.2.8
+	gopkg.in/yaml.v2 v2.3.0
 	mvdan.cc/xurls/v2 v2.1.0
 	strk.kbt.io/projects/go/libravatar v0.0.0-20191008002943-06d1c002b251
 	xorm.io/builder v0.3.7