avoid rubygems warnings about dependency versioning

Change-Id: I321b01de61ec828075e4d5597b8e538553aabe6d
Reviewed-on: https://gerrit.instructure.com/43166
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Rob Orton <rob@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>
update_all/delete_all should not return an array for multi-shard queries

fixes gh-5

Change-Id: I81e6fd7d25ecbdef1dedcbf77ce226af046d77a7
Reviewed-on: https://gerrit.instructure.com/43218
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Rob Orton <rob@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>