Update .npmignore

Author: testshallpass

.npmignore

@@ -20,4 +20,13 @@ npm-debug.log
 babel.config.js
 jest.config.js
 tsconfig.json
-.yarnrc.yml
+.yarnrc.yml
+
+# Yarn
+example/.yarn/*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions