.gitignore in extralite-2.6 vs .gitignore in extralite-2.7

@@ -9,9 +9,10 @@
 /test/tmp/
 /test/version_tmp/
 /tmp/
 lib/extralite_ext.*
 Gemfile-bundle.lock
+Gemfile.lock
 /cmake-build-debug/
 CMakeLists.txt
 
 # Used by dotenv library to load environment variables.
 # .env