Regenerate gemspec for version 0.17.4
Regenerate gemspec for version 0.17.4

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