.before() and .after() don't work for tasks in series/parallel

@ecraig12345 2019-08-19 18:23:13发表于 microsoft/just

Suppose I want to use the webapp preset and add something before (or after) the ts task:

const { taskPresets, chain } = require('just-scripts');

If I run just-scripts ts, my additional task will run. But if I do just-scripts build (which contains ts), it won't run my additional task.

So...extensible task configs? :D