Configurable build stats column width

[599316527]

What problem does this feature solve?

vue-cli/packages/@vue/cli-service/lib/commands/build/formatStats.js

Line 6 in 357c99a

const ui = require('cliui')({ width: 80 })

The default width (80) is too narrow to place filename with prefix like dist/projectName.umd.min.venders~ of split code and filenames are forced to break to the next line even though there are enough space at the right side of rows.

With a configuration for the width, I can adjust it to fit my terminal's width.

What does the proposed API look like?

{width: process.env.VUE_CLI_BUILD_STATS_CLOUMN_WIDTH || 80}