chore: fix a stylus syntax error (#474)

MT · ulivz · commit d9130c6eed0d · 2018-05-21T17:07:04.000+08:00
diff --git a/lib/default-theme/styles/nprogress.styl b/lib/default-theme/styles/nprogress.styl
@@ -42,5 +42,7 @@
   position absolute
 
 @keyframes nprogress-spinner
-  0% transform rotate(0deg)
-  100% transform rotate(360deg)
+  0%
+    transform rotate(0deg)
+  100%
+    transform rotate(360deg)
