Composer Update

[stovepot]

Composer complaints about this:

Problem 1
- The requested package amimpact/command-palette could not be found in any version, there may be a typo in the package name.

Craft Pro 3.0.17.1
Alfred: 3.1.4

[jamesmacwhite]

I have also encountered this on a recent project from Craft 2 to Craft 3. Installing via plugin store seemed to write amimpact/command-palette into composer, but this is incorrect and should be am-impact/amcommand. It was previously reported in #37 but seems to be happening still.