Enable ignore-optional for yarn

This option is apparently fixed in yarn 1.6.0: yarnpkg/yarn#5059
jasongrout · Apr 27, 2018 · d4a9db6 · d4a9db6
1 parent 6f08eb1
commit d4a9db6
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.yarnrc b/.yarnrc
@@ -1,3 +1,4 @@
 yarn-path "./jupyterlab/staging/yarn.js"
 workspaces-experimental true
 registry "https://registry.npmjs.org"
+ignore-optional true