target right n-ui versions (#147)

Makefile

@@ -92,7 +92,7 @@ ifneq ($(CIRCLE_BUILD_NUM),)
 # The app is using n-ui
 ifneq ($(shell grep -s -Fim 1 n-ui bower.json),)
 # versions in package.json and bower.json are not equal
-ifneq ($(shell grep -s -Fim 1 version bower_components/n-ui/.bower.json),$(shell grep -s -Fim 1 version node_modules/@financial-times/n-ui/package.json))
+ifneq ($(shell grep -s -Fim 1 \"version\" bower_components/n-ui/.bower.json | sed s/,//),$(shell grep -s -Fim 1 \"version\" node_modules/@financial-times/n-ui/package.json | sed s/,//))
 	$(error 'Projects using n-ui must maintain parity between versions. Rebuild without cache and update your bower.json and package.json if necessary')
 endif
 endif