Update dependency net-ftp to "~>0.3.0"

Author: renovate[bot]

Gemfile

@@ -57,7 +57,7 @@ gem "manageiq-ssh-util",                "~>0.2.0",           :require => false
 gem "memoist",                          "~>0.16.0",          :require => false
 gem "money",                            "~>6.13.5",          :require => false
 gem "more_core_extensions"                                                     # min version should be set in manageiq-gems-pending, not here
-gem "net-ftp",                          "~>0.1.2",           :require => false
+gem "net-ftp",                          "~>0.3.0",           :require => false
 gem "net-ldap",                         "~>0.16.1",          :require => false
 gem "net-ping",                         "~>1.7.4",           :require => false
 gem "openscap",                         "~>0.4.8",           :require => false