chore(gitignore): add '.idea/'

WuHuiling · chuan6 · commit 6d3be03a728e · 2019-07-22T15:44:43.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -6,3 +6,4 @@ coverage
 .nyc_output
 .awcache
 .happypack
+.idea/
