docs: fix version in README
docs: fix version in README

alexander-alvarez/karma-junit-reporter,thescientist13/karma-junit-reporter,mozimos/karma-junit-reporter,sethmcl/karma-junit-reporter,patrot/karma-junit-test-spec-formatter,darksmile/karma-junit-reporter,janeklb/karma-junit-reporter,tux4/karma-junit-reporter,existentialism/karma-junit-reporter,adriaanthomas/karma-junit-reporter,karma-runner/karma-junit-reporter,StoneCypher/karma-junit-reporter,patrot/karma-junit-reporter,budde377/karma-junit-reporter,robrich/karma-junit-reporter