Bump max connman_dbus version to 0.5

Bump dependency constraints on connman_dbus to include version that uses the
new dbus_proxy API for connect signal.

rockspec/connman_widget-0.2.0-2.rockspec

@@ -0,0 +1,27 @@
+package = "connman_widget"
+version = "0.2.0-2"
+source = {
+   url = "git://github.com/stefano-m/awesome-connman_widget",
+   tag = "v0.2.0"
+}
+description = {
+   summary = "A Connman widget for the Awesome Window Manager",
+   detailed = [[
+    Monitor your network devices in Awesome with Connman and DBus.
+    ]],
+   homepage = "https://github.com/stefano-m/awesome-connman_widget",
+   license = "GPL v3"
+}
+supported_platforms = {
+   "linux"
+}
+dependencies = {
+   "lua >= 5.1",
+   "connman_dbus >= 0.3.0, < 0.5"
+}
+build = {
+   type = "builtin",
+   modules = {
+      ["connman_widget.init"] = "src/connman_widget/init.lua"
+   }
+}