Revert "add grunt-cli to devDeps, fix travis"
Revert "add grunt-cli to devDeps, fix travis"

This reverts commit bc12af42395b11582899f63ee57c1702e8edb7e0.

This commit was done after the V3 branch started, we should have
done it in a V2 branch. Did not thought about it before, will
be cherry picked in the algoliasearch helper by @bobylito

2947721120/algoliasearch-client-js,algolia/algoliasearch-client-javascript,leohmoraes/algoliasearch-client-js,Acidburn0zzz/algoliasearch-client-js,algolia/algoliasearch-client-js,MenZil/algoliasearch-client-js,MenZil/algoliasearch-client-js,2947721120/algoliasearch-client-js,algolia/algoliasearch-client-javascript,2947721120/algoliasearch-client-js,MenZil/algoliasearch-client-js,algolia/algoliasearch-client-javascript,algolia/algoliasearch-client-javascript,Acidburn0zzz/algoliasearch-client-js,leohmoraes/algoliasearch-client-js,algolia/algoliasearch-client-js,leohmoraes/algoliasearch-client-js,Acidburn0zzz/algoliasearch-client-js,algolia/algoliasearch-client-js