chore: ignore Intellij IDEA project files (#1361)

Imon-Haque · dead-horse · commit 52a673703a87 · 2019-07-24T19:06:56.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -2,3 +2,5 @@ node_modules
 test.js
 coverage
 npm-debug.log
+.idea
+*.iml
