.versionrc is ignored with programmatic usage (code usage)

[crutch12]

Describe the bug
.versionrc is ignored with programmatic usage (code usage).

Current behavior
.versionrc is used only with cli usage

standard-version/command.js

Line 120 in f579ff0

.config(getConfiguration())

Expected behavior
.versionrc should be used automatically with code usage too

const standardVersion = require('standard-version')
standardVersion({ /* ... */ })

Environment

• standard-version version(s): v9.3.2
• Node/npm version: Node 16/npm 8
• OS: Windows 10