Auth: Enhance password validation.

Increase minimum length to 20.
Check for digits, lower/upper case and special characters.

Change-Id: I7837780716487843f01ed2af97fcf30505d27ef7
diff --git a/core/auth/ui/go.mod b/core/auth/ui/go.mod
index 49c33b1..0930937 100644
--- a/core/auth/ui/go.mod
+++ b/core/auth/ui/go.mod
@@ -1,8 +1,19 @@
 module github.com/giolekva/pcloud/core/auth/ui
 
-go 1.16
+go 1.20
 
 require (
 	github.com/gorilla/mux v1.8.0
 	github.com/itaysk/regogo v0.0.0-20200423164851-e9433c1fe5a7
 )
+
+require (
+	github.com/OneOfOne/xxhash v1.2.7 // indirect
+	github.com/ghodss/yaml v0.0.0-20180820084758-c7ce16629ff4 // indirect
+	github.com/gobwas/glob v0.2.3 // indirect
+	github.com/open-policy-agent/opa v0.18.0 // indirect
+	github.com/pkg/errors v0.0.0-20181023235946-059132a15dd0 // indirect
+	github.com/rcrowley/go-metrics v0.0.0-20181016184325-3113b8401b8a // indirect
+	github.com/yashtewari/glob-intersection v0.0.0-20180916065949-5c77d914dd0b // indirect
+	gopkg.in/yaml.v2 v2.2.1 // indirect
+)