kiji-schema: [maven-release-plugin] prepare for next development iteration

commit: https://github.com/kijiproject/kiji-schema/commit/6a56677ba831eeb4eb8c427ede49bb2626a7c866
kiji-schema: [maven-release-plugin] prepare release kiji-schema-root-1.3.6

commit: https://github.com/kijiproject/kiji-schema/commit/46b03ba37f886f0592aaf70a2af0efd4a908ccc6