Ignore .idea/library directory.

Jinge Wang · Jinge Wang · commit aff81114e376 · 2022-04-10T11:08:27.000+08:00
diff --git a/.gitignore b/.gitignore
@@ -7,3 +7,7 @@
 
 # Ignore Gradle build output directory
 build
+
+# Ignore library directory in .idea.
+# Not sure what these file used for.
+/.idea/libraries/
