add .idea dir to gitignore (kyuupichan#729)

rayspock · Neil · commit ed59ea9f517b · 2019-02-10T06:45:22.000+07:00
diff --git a/.gitignore b/.gitignore
@@ -10,3 +10,4 @@ docs/_build
 /dist
 /electrumx.egg-info
 .vscode/
+.idea/
