updated the changelog
updated the changelog

oafridi/savon,Eric-Guo/savon,hayesgm/wasabi,SICSoftwareGmbH/savon,savonrb/wasabi,AnyPresence/wasabi,billr578/savon,zerobatu/savon,enahum/savon,rtrepo/savon,gocardless/wasabi,mpangrazzi/savon,hoanghiep90/wasabi,latortuga/savon,savonrb/savon