[maven-release-plugin] copy for tag v1.6.0

[maven-release-plugin] copy for tag v1.5.0

Bump version to 1.4.2

Bump version to 1.4.1

Bump version to 1.4.0

Merge pull request kobylynskyi#18 from kobylynskyi/feature/subscripti…

…on-return-type

Subscription methods with custom return type kobylynskyi#14

Dump version to 1.2.3

Bump version to 1.2.2

Populate field annotation for GraphQL input type kobylynskyi#7

Bump version to 1.2