fix golangci-lint timeout, bump email min TLS version

backend/.golangci.yml

@@ -1,4 +1,5 @@
 run:
+  timeout: 5m
   output:
     format: tab
   skip-dirs:
@@ -74,4 +75,4 @@ issues:
   exclude-use-default: false
 
 service:
-  golangci-lint-version: 1.23.x
+  golangci-lint-version: 1.31.x

backend/app/notify/email.go

@@ -379,6 +379,7 @@ func (s *emailClient) Create(params SMTPParams) (smtpClient, error) {
 		tlsConf := &tls.Config{
 			InsecureSkipVerify: false,
 			ServerName:         params.Host,
+			MinVersion:         tls.VersionTLS12,
 		}
 		conn, err := tls.Dial("tcp", srvAddress, tlsConf)
 		if err != nil {