Regenerate gemspec for version 0.12.16
Regenerate gemspec for version 0.12.16

edmundhighcock/coderunner,edmundhighcock/coderunner,edmundhighcock/coderunner,coderunner-framework/coderunner,coderunner-framework/coderunner,coderunner-framework/coderunner,coderunner-framework/coderunner