add --preserve-symlinks option from Node 6.3

https://github.com/browserify/browserify/pull/1742 https://github.com/browserify/browserify/pull/1801

update the browser version of events to 2.0.0—this version adds methods like prependListener that were introduced in recent node versions, but it is also twice the size of events v1.x (2KB instead of 1KB).

https://github.com/browserify/browserify/pull/1803

Dynamically calculate __dirname and __filename when --node is passed

https://github.com/browserify/browserify/pull/1725

upgrade module-deps, see https://github.com/browserify/module-deps/releases/tag/v6.0.0

https://github.com/browserify/browserify/commit/e5e1ec8799f1007a56118ae46646e0048385ed84