Regenerate gemspec for version 1.2.3
Regenerate gemspec for version 1.2.3

weshatheleopard/rubyXL,ryanmark/rubyXL,mezza/rubyXL,weshatheleopard/rubyXL,parallel588/rubyXL,ThijsWouters/rubyXL,ryanmark/rubyXL,weshatheleopard/rubyXL,parallel588/rubyXL,99cm/rubyXL,mezza/rubyXL,mezza/rubyXL,parallel588/rubyXL,99cm/rubyXL,ThijsWouters/rubyXL,99cm/rubyXL,ryanmark/rubyXL