fix: rename underscored to dots for nested query path

* fix: rename underscored to dots for nested query path

* fixed linting issue

fix: PageInfo must define one or more fields

Fixes a regression introduced in `v3.1`. `schemaComposer.createObjectTC` accepts a `typeDef`, which could be a `string` (as in https://github.com/graphql-compose/graphql-compose-elasticsearch/blob/v3.1.1/src/resolvers/searchConnection.js#L141). `cfg` does not have `field` attributes in this case, causing `PageInfo` to be empty.

Closes graphql-compose#60

fix: rename underscored to dots for nested queries

feat: upgrade till [email protected]

fix: complete code refactoring due graphql-compose@6

refactor: due changes in [email protected]

BREAKING CHANGE: Using API from [email protected]

fix(ElasticApiParser): Valid number encoded as string gets parsed and…

… retained

fix: ignore non-numeric default value for Float field

Closes graphql-compose#49

feat: add fetchElasticMapping helper

* add fetchElasticMapping helper

* fix lint error

* fix return Promise type

* fix lint error

chore: update dependencies