Add purple to the list of colorstring codes
Add purple to the list of colorstring codes

This is the first color code introduced for 256 color terminals, and
should be a safe addition when considering the oldest supported
platform.

tommynsong/terraform,ewbankkit/terraform,rnaveiras/terraform,rnaveiras/terraform,ewbankkit/terraform,hashicorp/terraform,tommynsong/terraform,ewbankkit/terraform,rnaveiras/terraform,hashicorp/terraform,hashicorp/terraform,ewbankkit/terraform,tommynsong/terraform