Set correct value for `this` in PolyfillSet
Set correct value for `this` in PolyfillSet

JakeChampion/polyfill-service,mcshaz/polyfill-service,mcshaz/polyfill-service,kdzwinel/polyfill-service,kdzwinel/polyfill-service,JakeChampion/polyfill-service,kdzwinel/polyfill-service,jonathan-fielding/polyfill-service,mcshaz/polyfill-service,jonathan-fielding/polyfill-service,jonathan-fielding/polyfill-service