This prevents the client-side tree shaking from occuring when dev
bundles are being built, since you always want that code included within
the bundle. Fixes #1044
Coverage increased (+0.002%) to 93.652% when pulling 4b7fbb085b9e5ba4dc5ed1be700280b1107fd1cd on shake-dev-bundles into fc9041069a808a2bc28ba3e59c1a49482172cf7e on master.
This prevents the client-side tree shaking from occuring when dev bundles are being built, since you always want that code included within the bundle. Fixes #1044