productionSourceMap not working for build target lib #1898
Description
Version
3.0.0-rc.5
Reproduction link
https://github.com/vuejs/vue-cli/issues/new
Steps to reproduce
build a lib with productionSourceMap config set to false
What is expected?
when productionSourceMap is set to false. No sourcemap is generated in the output folder
What is actually happening?
when productionSourceMap is set to false. source map is stil generated