message: build: remove sourcemap from build
diff: @@ -61,7 +61,7 @@ function createConfig(format, output, plugins = []) {
  process.exit(1)
  }
  - output.sourcemap = true
  + output.sourcemap = !!process.env.SOURCE_MAP
  output.banner = banner
  output.externalLiveBindings = false
  output.globals = { vue: 'Vue' }
  