Version 1.2.1

A few fixes mostly around the settings plugin + publishing timeout and a new API for those using the plugin programmatically.

All Changes

Settings plugin: only apply to subprojects if the maven-publish plugin is applied by @martinbonnin in #196
Settings plugin: allow the root project to apply both the regular and aggregation plugins by @martinbonnin in #198
Use allprojects {} instead of subprojects {} by @martinbonnin in #199
Fix publishing timeout by @martinbonnin in #201
Add publishFileByFile(File, File) helper function by @martinbonnin in #207