Add yarn.lock to .gitignore (facebook#7789)

lukyth · ianschmitz · commit c34aa1369d25 · 2019-10-26T21:06:20.000-07:00
diff --git a/.gitignore b/.gitignore
@@ -12,3 +12,4 @@ yarn-debug.log*
 yarn-error.log*
 /.changelog
 .npm/
+yarn.lock
