bump loader-utils and @angular-devkit/build-angular#13

dependabot[bot] wants to merge 1 commit intomasterCallan003/chatApp:masterfrom

dependabot/npm_and_yarn/loader-utils-and-loader-utils-and-angular-devkit/build-angular-2.0.4Callan003/chatApp:dependabot/npm_and_yarn/loader-utils-and-loader-utils-and-angular-devkit/build-angular-2.0.4Copy head branch name to clipboard