fix(deps): update module github.com/fclairamb/ftpserverlib to v0.28.0

Author: renovate[bot]

go.mod

@@ -12,7 +12,7 @@ require (
 	github.com/fclairamb/afero-gdrive v0.3.0
 	github.com/fclairamb/afero-s3 v0.3.1
 	github.com/fclairamb/afero-snd v0.1.0
-	github.com/fclairamb/ftpserverlib v0.27.1
+	github.com/fclairamb/ftpserverlib v0.28.0
 	github.com/fclairamb/go-log v0.6.0
 	github.com/go-crypt/crypt v0.4.7
 	github.com/go-mail/mail v2.3.1+incompatible

go.sum

@@ -224,6 +224,8 @@ github.com/fclairamb/ftpserverlib v0.27.0 h1:HcCdVNTs9Irc0T/eHRqkcGkOejwg39WiqBd
 github.com/fclairamb/ftpserverlib v0.27.0/go.mod h1:Wi6QrU/oxgjSgcDjFUxQHlkJfVU/94t4+zNufrkdNU8=
 github.com/fclairamb/ftpserverlib v0.27.1 h1:ecNR2Yw186lfai+K9I2dHuK0xcp4/FgB+QUukOHdEgw=
 github.com/fclairamb/ftpserverlib v0.27.1/go.mod h1:mTv0exQ08+16lVKDFIwJOvS2wXbIvCKM4MPvfmmgWow=
+github.com/fclairamb/ftpserverlib v0.28.0 h1:SdQYxxpAM6Y+FGffKAHCcPxLIdagNOCqOmY1WXYJfe0=
+github.com/fclairamb/ftpserverlib v0.28.0/go.mod h1:oiQyZ8h8P5zuZhIkZ+SdZvU69gSHZZVuKdhIdZ+RSxI=
 github.com/fclairamb/go-log v0.0.0-20210717204555-d370617e3635/go.mod h1:iqmym8aI6xBbZXnZSPjElrmQrlEwjwEemOmIzKaTBM8=
 github.com/fclairamb/go-log v0.0.0-20210725225107-80efc81cb386/go.mod h1:iqmym8aI6xBbZXnZSPjElrmQrlEwjwEemOmIzKaTBM8=
 github.com/fclairamb/go-log v0.6.0 h1:1V7BJ75P2PvanLHRyGBBFjncB6d4AgEmu+BPWKbMkaU=