feat(@ngtools/webpack): support TypeScript 3.8
feat(@ngtools/webpack): support TypeScript 3.8

manekinekko/angular-cli,manekinekko/angular-cli,angular/angular-cli,ocombe/angular-cli,Brocco/angular-cli,catull/angular-cli,manekinekko/angular-cli,angular/angular-cli,geofffilippi/angular-cli,angular/angular-cli,Brocco/angular-cli,ocombe/angular-cli,filipesilva/angular-cli,filipesilva/angular-cli,geofffilippi/angular-cli,Brocco/angular-cli,beeman/angular-cli,geofffilippi/angular-cli,catull/angular-cli,ocombe/angular-cli,beeman/angular-cli,beeman/angular-cli,catull/angular-cli,catull/angular-cli,filipesilva/angular-cli,ocombe/angular-cli,clydin/angular-cli,filipesilva/angular-cli,clydin/angular-cli,clydin/angular-cli,ocombe/angular-cli,clydin/angular-cli,Brocco/angular-cli,geofffilippi/angular-cli,Brocco/angular-cli,angular/angular-cli,beeman/angular-cli