Update bootstrap script to include cf

bootstrap

@@ -15,6 +15,7 @@ main(_Args) ->
     %% Fetch and build deps required to build rebar3
     BaseDeps = [{providers, []}
                ,{getopt, []}
+               ,{cf, []}
                ,{erlware_commons, ["ec_dictionary.erl", "ec_vsn.erl"]}
                ,{certifi, []}],
     Deps = get_deps(),