fix(deps): update failling yarn.lock

[s-pace]

This PR fixes the build error:

[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
warning Pattern ["object-assign@latest"] is trying to unpack in the same destination "/Users/sylvain.pace/Library/Caches/Yarn/v6/npm-object-assign-4.1.1-2109adc7965887cfc05cbbd442cac8bfbb360863-integrity/node_modules/object-assign" as pattern ["object-assign@^4.1.0","object-assign@^4.1.0","object-assign@^4.0.1","object-assign@^4.0.1","object-assign@^4","object-assign@^4.1.1","object-assign@^4.1.1"]. This could result in non-deterministic behavior, skipping.
error An unexpected error occurred: "https://registry.yarnpkg.com/es-abstract/-/es-abstract-1.14.0.tgz: Request failed \"404 Not Found\"".
info If you think this is a bug, please open a bug report with the information provided in "/Users/sylvain.pace/docsearch/docsearch/yarn-error.log".

Fix suggested by elrumordelaluz/reactour#196