Remove node_modules from watcher exclusions

[kerwanp]

Problem

There is a regression since watcher has been moved to the assembler as node_modules are fully ignored impacting the developer experience when working in a mono-repository setup.

In a Yarn mono-repository, workspaces are symlinked inside node_modules, allowing other workspaces to depend on them by using classic module resolving. By watching node_modules it would notify hot-hook about changes done inside a package of the mono-repository and perform reload if it is part of the dependency tree.

It was also useful in classic repositories as installing new packages would also trigger a reload (it now requires a manual restart/reload) or when manually editing files in node_modules for debugging.

Solution

node_modules should not be ignored and in fact should notify hot-hook about changes.