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

commit: https://github.com/kijiproject/kiji-schema-shell/commit/6d6b27ef28a9e15fbdac66a374e060fe9ba2aaeb
kiji-schema-shell: [maven-release-plugin] prepare release kiji-schema-shell-1.3.7

commit: https://github.com/kijiproject/kiji-schema-shell/commit/edcc33de9cc152f1c588d12f81c4ac311dca30e1