make powershell completion works to fill task name

[trim21]

this is a completion script only change, you can copy the powershell script to local to use it get merged and released

( <tab> is for Tab input)

before:

❯❯ ~\..\..\task git:(master) task l<tab>
clean          docs           lint           npm            sleepit        test-release
default        install        mod            packages       test

after:

task l<tab> -> task lint

OR show prefix matches

❯❯ ~\..\..\task git:(master) task d<tab>
default   docs

as for : splited sub task

task do<tab> -> task docs

task docs<tab> -> task docs:

then

❯❯ ~\..\..\task git:(master) task docs:<tab>
docs:build       docs:changelog   docs:clean       docs:deploy      docs:setup       docs:start

and current output format of --list-all make it hard to support sub task like docs:clean or bu ild, so just make current script works and ignore these cases.

[andreynering]

Thanks @trim21!