upgrade relx 3.31.0

rebar.config

@@ -8,7 +8,7 @@
         {providers,           "1.7.0"},
         {getopt,              "1.0.1"},
         {bbmustache,          "1.6.1"},
-        {relx,                "3.30.0"},
+        {relx,                "3.31.0"},
         {cf,                  "0.2.2"},
         {cth_readable,        "1.4.3"},
         {eunit_formatters,    "0.5.0"}]}.

rebar.lock

@@ -8,7 +8,7 @@
  {<<"getopt">>,{pkg,<<"getopt">>,<<"1.0.1">>},0},
  {<<"parse_trans">>,{pkg,<<"parse_trans">>,<<"3.3.0">>},0},
  {<<"providers">>,{pkg,<<"providers">>,<<"1.7.0">>},0},
- {<<"relx">>,{pkg,<<"relx">>,<<"3.30.0">>},0},
+ {<<"relx">>,{pkg,<<"relx">>,<<"3.31.0">>},0},
  {<<"ssl_verify_fun">>,{pkg,<<"ssl_verify_fun">>,<<"1.1.4">>},0}]}.
 [
 {pkg_hash,[
@@ -21,6 +21,6 @@
  {<<"getopt">>, <<"C73A9FA687B217F2FF79F68A3B637711BB1936E712B521D8CE466B29CBF7808A">>},
  {<<"parse_trans">>, <<"09765507A3C7590A784615CFD421D101AEC25098D50B89D7AA1D66646BC571C1">>},
  {<<"providers">>, <<"BBF730563914328EC2511D205E6477A94831DB7297DE313B3872A2B26C562EAB">>},
- {<<"relx">>, <<"F28F745053118331B2C873B8CA3CE812A760FC664836ACA5554055AD712BA47F">>},
+ {<<"relx">>, <<"7EBA13DFFC4EEA9FBFAE2B42B739AFDE268E07C3EE7207872CD74782A4913455">>},
  {<<"ssl_verify_fun">>, <<"F0EAFFF810D2041E93F915EF59899C923F4568F4585904D010387ED74988E77B">>}]}
 ].