.gitignore in sms77-0.4.0 vs .gitignore in sms77-0.5.0

@@ -1,4 +1,6 @@
-build/
-*.gem
-Gemfile.lock
-.ruby-gemset
+.yardoc/
+build/
+*.gem
+Gemfile.lock
+.ruby-gemset
+.tool-versions
\ No newline at end of file