Fix import sort order in backends/openwrt/converters/__init__.py

Author: jonathanunderwood

netjsonconfig/backends/openwrt/converters/__init__.py

@@ -1,4 +1,5 @@
 from .default import Default
+from .firewall import Firewall
 from .general import General
 from .interfaces import Interfaces
 from .led import Led
@@ -9,7 +10,6 @@
 from .rules import Rules
 from .switch import Switch
 from .wireless import Wireless
-from .firewall import Firewall
 
 __all__ = [
     "Default",