chore(package): update eslint to version 3.12.2
chore(package): update eslint to version 3.12.2

https://greenkeeper.io/

baer/graphql-js,gabelevi/graphql-js,graphql/graphql-js,enaqx/graphql-js,jjergus/graphql-js,jjergus/graphql-js,enaqx/graphql-js,tgriesser/graphql-js,gabelevi/graphql-js,baer/graphql-js,tgriesser/graphql-js,graphql/graphql-js,graphql/graphql-js,enaqx/graphql-js