Automatically open release file using editor of choice

[Mrtenz]

A small UX improvement would be to open the release file using the editor of choice. We could have a simple config file in the user's home folder which stores the command to run to open the file, and call that when creating the release file.

[mcmire]

@Mrtenz Right now it checks for EDITOR and uses that first if it's defined:

create-release-branch/src/editor.ts

Line 27 in 99b81d7

const { EDITOR } = getEnvironmentVariables();

. Is that enough or do you feel like having a config file would be more reliable?