Regenerate gemspec for version 0.16.8
Regenerate gemspec for version 0.16.8

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