Back Port WebPack (#2641)

clients/ts/FunctionalTests/package-lock.json

clients/ts/FunctionalTests/package.json

clients/ts/FunctionalTests/rollup.config.js

clients/ts/FunctionalTests/webpack.config.js

clients/ts/package-lock.json

clients/ts/package.json

clients/ts/signalr-protocol-msgpack/package-lock.json

clients/ts/signalr-protocol-msgpack/package.json

clients/ts/signalr-protocol-msgpack/webpack.config.js

clients/ts/signalr/package-lock.json

clients/ts/signalr/package.json

clients/ts/signalr/src/HubConnection.ts

clients/ts/signalr/webpack.config.js

clients/ts/webdriver-tap-runner/package-lock.json

clients/ts/webpack.config.base.js