.gitignore in serialport-1.3.0 vs .gitignore in serialport-1.3.1

@@ -5,11 +5,12 @@
 /ext/native/*.bundle
 /ext/native/*.log
 /ext/native/*.o
 /ext/native/*.so
 /ext/native/Makefile
+lib/*.so
 .*.swp
 tags
 *.gem
 *.bundle
 Gemfile.lock
-.yardoc
\ No newline at end of file
+.yardoc